Compare Mobile SIMs in United Kingdom

UK's SIM-only market has 208 tracked plans from providers operating on the EE, O2, Vodafone and Three networks. Check which underlying network the MVNO uses and compare coverage in your area before switching — look for data rollover and eSIM support if you travel frequently.

231 live mobile sims offers tracked across 22 UK providers. Data current as of 21 October 2026 and updated daily from the Giraffy database.

Live offers

150 live offers compared from 22 providers, from £1 /month. Updated daily.

Penny Pro Talk Home Mobile

£0 /month

Data: 1p/MB
Calls & SMS: 1p/Minute calls, 1p/SMS texts
EU Roaming: Check rates for roaming
Network: 5G
Contract: No contract
Payment Plan: Postpaid
5G: Yes

Prepay PAYG - The 1p Tariff 1pMobile

£1 /month

Price shown is for SIM card purchase. Requires top-up every 120 days.

Data: PAYG (1p/MB)
Calls & SMS: 1p/min calls, 1p/text texts
EU Roaming: Free EU roaming*
Network: 5G
Contract: No contract
Payment Plan: Prepaid
5G: Yes

5GB Plan Lebara

£1.48 /month

Data: 5GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roaming in 37 destinations
Network: 5G
Contract: No contract
Payment Plan: Prepaid
5G: Yes

10GB Plan Lebara

£2.38 /month

Data: 10GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roaming in 37 destinations
Network: 5G
Contract: No contract
Payment Plan: Prepaid
5G: Yes

80GB iD Mobile

£2.50 /month

Data: 80 GB
Provider: iD Mobile

20GB Plan Lebara

£2.78 /month

Data: 20GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roaming in 37 destinations
Network: 5G
Contract: No contract
Payment Plan: Prepaid
5G: Yes

120GB iD Mobile

£3 /month

Data: 120 GB
Provider: iD Mobile

50GB Plan Lebara

£3.18 /month

Data: 50GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roaming in 37 destinations
Network: 5G
Contract: No contract
Payment Plan: Prepaid
5G: Yes

300GB iD Mobile

£3.50 /month

Data: 300 GB
Provider: iD Mobile

5 GB Lycamobile Lycamobile

£3.50 /month

Data: 5 GB
Provider: Lycamobile

spusu 3 spusu

£3.90 /month

Data: 3GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roam up to 1GB in 41 destinations
Network: 5G
Contract: 1 month (rolling)
Payment Plan: Postpaid
5G: Yes

Just Talk Ecotalk

£4 /month

All mobile plans are on 30-day rolling contracts.. Roaming in Europe for £2 per day.. Worldwide data roaming limit of £40 per month.

Data: 0GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Europe roaming for £2 per day
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

FREE Mozillion

£4 /month

Data: 1 GB
Minutes: Unlimited
Provider: Mozillion

Unlimited iD Mobile

£4 /month

Data: Unlimited
Provider: iD Mobile

Mozillion Plan Mozillion

£4 /month

Provider: Mozillion

100GB Plan Lebara

£4.78 /month

Data: 100GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roaming in 37 destinations
Network: 5G
Contract: No contract
Payment Plan: Prepaid
5G: Yes

spusu 5 spusu

£4.90 /month

Rolling monthly contract renews automatically. EU roaming includes Switzerland, Iceland, Liechtenstein, Moldova, Norway and Ukraine. Uses the EE network. All plans are 5G ready at no extra cost.

Data: 5 GB
Calls & SMS: Unlimited calls & texts
EU Roaming: 3 GB data, 500 minutes and 500 SMS in EU & Switzerland
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

100GB data Talkmobile

£4.98 /month

Data: 100 GB
Minutes: Unlimited
Network: Vodafone

UK Plan Smart Lycamobile

£5 /month

Unlimited allowances subject to fair usage policy. 12 and 24-month PAYG options available with discounted pricing

Data: 5GB
Calls & SMS: 1000 UK calls and texts calls, 1000 UK calls and texts texts
EU Roaming: EU roaming included
Network: 5G
Contract: No contract
Payment Plan: Prepaid
5G: Yes

1GB 24-Months SIM Mozillion

£5 /month

T&Cs apply. Runs on the UK's Best Network (RootMetrics 2025 winner). No mid-contract price rises.

Data: 1GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming in 41 countries. Data limit: 50% of allowance (0.5GB).
Network: 5G Uncapped
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

2GB Data Only SMARTY

£5 /month

EU roaming subject to 12GB fair use limit.. Monthly rolling contract, cancel anytime.. Tablet and Mobile Broadband SIM

Data: 2GB
Calls & SMS: Data Only calls, Data Only texts
EU Roaming: Includes EU roaming (12GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

Starter Plus Talk Home Mobile

£5 /month

No Mid Contract Price Rises until 2026

Data: 5GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU Roaming included (EU/EEA, Australia, San Marino, Ukraine)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

Starter Max 12 Talk Home Mobile

£5 /month

No Mid Contract Price Rises until 2026

Data: 7GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU Roaming included (EU/EEA, Australia, San Marino, Ukraine)
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

Starter (PAYG Bundle) Talk Home Mobile

£5 /month

Data: 4GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU Roaming included (EU/EEA, Australia, San Marino, Ukraine)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Prepaid
5G: Yes

1GB Bundle 1pMobile

£5 /month

Data: 1GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming*
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

5GB 30-Day Plan Lebara

£5 /month

Customers save average £12/month when switching from big networks

Data: 5GB
Calls & SMS: 1000 UK minutes and texts calls, 1000 UK minutes and texts texts
EU Roaming: International calling included
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Prepaid
5G: Yes

100GB iD Mobile

£5 /month

Data: 100 GB
Provider: iD Mobile

1GB 12-Months SIM Mozillion

£5.50 /month

T&Cs apply. Runs on the UK's Best Network (RootMetrics 2025 winner). No mid-contract price rises.

Data: 1GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming in 41 countries. Data limit: 50% of allowance (0.5GB).
Network: 5G Uncapped
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

Talkmobile Winter Saver 15GB Data SIM Only (30 Day) Talkmobile

£5.95 /month

Subject to minimum term.. 5GB fair use limit applies to roaming.. Unlimited minutes and texts included with all plans.

Data: 15GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roaming in 47 European destinations at no extra cost (5GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

5GB Data Plan Sky Mobile

£6 /month

Data plan price may increase during 12-month minimum term.. Price was £12, now £6 per month on a 12-month contract.

Data: 5GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roaming Passport Plus pass available for a daily charge in 55 select destinations, including the EU.
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

1GB 1-Month SIM Mozillion

£6 /month

T&Cs apply. Runs on the UK's Best Network (RootMetrics 2025 winner). No mid-contract price rises.

Data: 1GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming in 41 countries. Data limit: 50% of allowance (0.5GB).
Network: 5G Uncapped
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

3GB 24-Months SIM Mozillion

£6 /month

T&Cs apply. Runs on the UK's Best Network (RootMetrics 2025 winner). No mid-contract price rises.

Data: 3GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming in 41 countries. Data limit: 25% of allowance (0.75GB).
Network: 5G Uncapped
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

10GB Data Plan Sky Mobile

£6 /month

Data plan price may increase during 12-month minimum term.. Double data promotion or discounted rate.

Data: 10GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roaming Passport Plus pass available for a daily charge in 55 select destinations, including the EU.
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

5GB SMARTY

£6 /month

EU roaming subject to 12GB fair use limit.. Monthly rolling contract, cancel anytime.

Data: 5GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Includes EU roaming (12GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

1GB Money Back SMARTY

£6 /month

EU roaming subject to 12GB fair use limit.. Monthly rolling contract, cancel anytime.. Get money back for unused data at £1 per GB (up to £1 back)

Data: 1GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Includes EU roaming (12GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

Child safe SIM deal - 1 month contract (500MB) Tesco Mobile

£6 /month

Non-Clubcard Price deals are subject to an annual price increase.. Plans subject to Fair Usage Policy.

Data: 500MB
Calls & SMS: Unlimited calls & texts
EU Roaming: No EU Roaming fees
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

4GB Bundle 1pMobile

£6 /month

Data: 4GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming*
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

15GB 12 month SIM iD Mobile

£6 /month

Award-winning network. Which? 'Great Value' endorsement

Data: 15GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming available
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

20GB 24 month SIM iD Mobile

£6 /month

Award-winning network. Which? 'Great Value' endorsement

Data: 20GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming available
Network: 5G
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

10GB 1 month SIM iD Mobile

£6 /month

Award-winning network. Which? 'Great Value' endorsement

Data: 10GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming available
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

25GB SIM (1 month) iD Mobile

£6 /month

Data: 25GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roam up to 25GB in 50 destinations
Network: 5G
Contract: 1 month (rolling)
Payment Plan: Postpaid
5G: Yes

2GB Monthly rolling giffgaff

£6 /month

Data: 2GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming up to 5GB
Network: 5G
Contract: 1 month (rolling)
Payment Plan: Postpaid
5G: Yes

3GB 12-Months SIM Mozillion

£6.50 /month

T&Cs apply. Runs on the UK's Best Network (RootMetrics 2025 winner). No mid-contract price rises.

Data: 3GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming in 41 countries. Data limit: 25% of allowance (0.75GB).
Network: 5G Uncapped
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

spusu 15 spusu

£6.90 /month

Rolling monthly contract renews automatically. EU roaming includes Switzerland, Iceland, Liechtenstein, Moldova, Norway and Ukraine. Uses the EE network. All plans are 5G ready at no extra cost.

Data: 15 GB
Calls & SMS: Unlimited calls & texts
EU Roaming: 6 GB data, 500 minutes and 500 SMS in EU & Switzerland
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

Talkmobile Winter Saver 30GB Data SIM Only (30 Day) Talkmobile

£6.95 /month

Subject to minimum term.. 5GB fair use limit applies to roaming.. Unlimited minutes and texts included with all plans.

Data: 30GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roaming in 47 European destinations at no extra cost (5GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

3GB 1-Month SIM Mozillion

£7 /month

T&Cs apply. Runs on the UK's Best Network (RootMetrics 2025 winner). No mid-contract price rises.

Data: 3GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming in 41 countries. Data limit: 25% of allowance (0.75GB).
Network: 5G Uncapped
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

10GB 24-Months SIM Mozillion

£7 /month

T&Cs apply. Runs on the UK's Best Network (RootMetrics 2025 winner). No mid-contract price rises.

Data: 10GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming in 41 countries. Data limit: 25% of allowance (2.5GB).
Network: 5G Uncapped
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

8GB SMARTY

£7 /month

EU roaming subject to 12GB fair use limit.. Monthly rolling contract, cancel anytime.

Data: 8GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Includes EU roaming (12GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

2GB Money Back SMARTY

£7 /month

EU roaming subject to 12GB fair use limit.. Monthly rolling contract, cancel anytime.. Get money back for unused data at £1 per GB (up to £2 back)

Data: 2GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Includes EU roaming (12GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

30GB SIM (12 month) Three

£7 /month

Data: 30GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Go Roam included
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

45GB SIM SMARTY

£7 /month

Data: 45GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roam up to 12GB in 45 destinations
Network: 5G
Contract: 1 month (rolling)
Payment Plan: Postpaid
5G: Yes

50GB SIM (1 month) iD Mobile

£7 /month

Data: 50GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roam up to 30GB in 50 destinations
Network: 5G
Contract: 1 month (rolling)
Payment Plan: Postpaid
5G: Yes

75 GB Lycamobile Lycamobile

£7.50 /month

Data: 75 GB
Provider: Lycamobile

10GB 12-Months SIM Mozillion

£7.50 /month

T&Cs apply. Runs on the UK's Best Network (RootMetrics 2025 winner). No mid-contract price rises.

Data: 10GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming in 41 countries. Data limit: 25% of allowance (2.5GB).
Network: 5G Uncapped
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

2GB data SIM only deal - 24 month contract Tesco Mobile

£7.50 /month

Non-Clubcard Price deals are subject to an annual price increase.. Plans subject to Fair Usage Policy.

Data: 2GB
Calls & SMS: Unlimited calls & texts
EU Roaming: No EU Roaming fees
Network: 5G
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

5GB Bundle 1pMobile

£7.50 /month

Data: 5GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming*
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

spusu 60 spusu

£7.90 /month

Data: 60GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roam up to 10GB in 41 destinations
Network: 5G
Contract: 1 month (rolling)
Payment Plan: Postpaid
5G: Yes

60GB SIM (30 day) Talkmobile

£7.95 /month

Data: 60GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming in 47 destinations (5GB fair use)
Network: 5G
Contract: 30 days
Payment Plan: Postpaid
5G: Yes

3GB Money Back SMARTY

£8 /month

EU roaming subject to 12GB fair use limit.. Monthly rolling contract, cancel anytime.. Get money back for unused data at £1 per GB (up to £3 back)

Data: 3GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Includes EU roaming (12GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

2GB data SIM only deal - 12 month contract Tesco Mobile

£8 /month

Non-Clubcard Price deals are subject to an annual price increase.. Plans subject to Fair Usage Policy.

Data: 2GB
Calls & SMS: Unlimited calls & texts
EU Roaming: No EU Roaming fees
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

6GB 18 month contract giffgaff

£8 /month

Data: 6GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming available
Network: 5G
Contract: 18 months
Payment Plan: Postpaid
5G: Yes

120GB Lite 24M Three

£8 /month

6 months half price. Price increases to £15.90/£17.80/£9.15 from 1 Apr 26 and further increases on 1 Apr 27

Data: 120GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming available
Network: 5G
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

National XL Lycamobile

£8 /month

Unlimited allowances subject to fair usage policy. 30-day PAYG plans. 12 and 24-month options available with discount

Data: 15GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming included
Network: 5G
Contract: No contract
Payment Plan: Prepaid
5G: Yes

10GB Bundle 1pMobile

£8 /month

Data: 10GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming*
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

9GB Plan Ecotalk

£8 /month

All mobile plans are on 30-day rolling contracts.. Roaming in Europe for £2 per day.. Worldwide data roaming limit of £40 per month.

Data: 9GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Europe roaming for £2 per day
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

10GB 1-Month SIM Mozillion

£8 /month

T&Cs apply. Runs on the UK's Best Network (RootMetrics 2025 winner). No mid-contract price rises.

Data: 10GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming in 41 countries. Data limit: 25% of allowance (2.5GB).
Network: 5G Uncapped
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

16GB SMARTY

£8 /month

EU roaming subject to 12GB fair use limit.. Monthly rolling contract, cancel anytime.

Data: 16GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Includes EU roaming (12GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

Basic Plus Talk Home Mobile

£8 /month

No Mid Contract Price Rises until 2026

Data: 15GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU Roaming included (EU/EEA, Australia, San Marino, Ukraine)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

Basic Max 12 Talk Home Mobile

£8 /month

No Mid Contract Price Rises until 2026

Data: 20GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU Roaming included (EU/EEA, Australia, San Marino, Ukraine)
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

Basic (PAYG Bundle) Talk Home Mobile

£8 /month

Data: 10GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU Roaming included (EU/EEA, Australia, San Marino, Ukraine)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Prepaid
5G: Yes

Ditch your network without drama VOXI

£8 /month

Data: Unlimited
Contract: No contract
Provider: VOXI

65GB SIM SMARTY

£8 /month

Data: 65GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roam up to 12GB in 45 destinations
Network: 5G
Contract: 1 month (rolling)
Payment Plan: Postpaid
5G: Yes

30GB 12 month SIM iD Mobile

£8 /month

Which? 'Great Value' endorsed network

Data: 30GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming available
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

5GB Monthly rolling giffgaff

£8 /month

Data: 5GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming up to 5GB
Network: 5G
Contract: 1 month (rolling)
Payment Plan: Postpaid
5G: Yes

VOXI Drop VOXI

£8 /month

Provider: VOXI

spusu 20 spusu

£8.90 /month

Rolling monthly contract renews automatically. EU roaming includes Switzerland, Iceland, Liechtenstein, Moldova, Norway and Ukraine. Uses the EE network. All plans are 5G ready at no extra cost.

Data: 20 GB
Calls & SMS: Unlimited calls & texts
EU Roaming: 8 GB data, 500 minutes and 500 SMS in EU & Switzerland
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

Talkmobile Winter Saver 80GB Data SIM Only (30 Day) Talkmobile

£8.95 /month

Subject to minimum term.. 5GB fair use limit applies to roaming.. Unlimited minutes and texts included with all plans.

Data: 80GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roaming in 47 European destinations at no extra cost (5GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

15GB Data Only SMARTY

£9 /month

EU roaming subject to 12GB fair use limit.. Monthly rolling contract, cancel anytime.. Tablet and Mobile Broadband SIM

Data: 15GB
Calls & SMS: Data Only calls, Data Only texts
EU Roaming: Includes EU roaming (12GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

12GB data SIM only deal - 24 month contract Tesco Mobile

£9 /month

Non-Clubcard Price deals are subject to an annual price increase.. Plans subject to Fair Usage Policy.

Data: 12GB
Calls & SMS: Unlimited calls & texts
EU Roaming: No EU Roaming fees
Network: 5G
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

Child safe SIM deal - 1 month contract (2GB) Tesco Mobile

£9 /month

Non-Clubcard Price deals are subject to an annual price increase.. Plans subject to Fair Usage Policy.

Data: 2GB
Calls & SMS: Unlimited calls & texts
EU Roaming: No EU Roaming fees
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

30GB 24-Months SIM Mozillion

£9 /month

T&Cs apply. Runs on the UK's Best Network (RootMetrics 2025 winner). No mid-contract price rises.

Data: 30GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming in 41 countries. Data limit: 25% of allowance (7.5GB).
Network: 5G Uncapped
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

70GB SIM (12 month) Vodafone

£9 /month

Data: 70GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roam up to 25GB in 4 destinations
Network: 4G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

Grade Mobile 10GB 24M Grade Mobile

£9 /month

10GB SIM-only on EE 5G.

Data: 10GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming included (fair use)
Network: 5G on EE
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

30GB 12-Months SIM Mozillion

£9.50 /month

T&Cs apply. Runs on the UK's Best Network (RootMetrics 2025 winner). No mid-contract price rises.

Data: 30GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming in 41 countries. Data limit: 25% of allowance (7.5GB).
Network: 5G Uncapped
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

spusu 40 spusu

£9.90 /month

Rolling monthly contract renews automatically. EU roaming includes Switzerland, Iceland, Liechtenstein, Moldova, Norway and Ukraine. Uses the EE network. All plans are 5G ready at no extra cost.

Data: 40 GB
Calls & SMS: Unlimited calls & texts
EU Roaming: 10 GB data, 500 minutes and 500 SMS in EU & Switzerland
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

All In One 10 Lycamobile

£9.90 /month

Data: 10 GB
Provider: Lycamobile

Talkmobile Winter Saver 100GB Data SIM Only (30 Day) Talkmobile

£9.95 /month

Subject to minimum term.. 5GB fair use limit applies to roaming.. Unlimited minutes and texts included with all plans.

Data: 100GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roaming in 47 European destinations at no extra cost (5GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

100GB SIM (12 month) Talkmobile

£9.95 /month

Data: 100GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming in 47 destinations (5GB fair use)
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

Unlimited Plan Lebara

£9.98 /month

Data: Unlimited
Calls & SMS: Unlimited calls & texts
EU Roaming: Roaming in 37 destinations
Network: 5G
Contract: No contract
Payment Plan: Prepaid
5G: Yes

Lycamobile Plan Lycamobile

£10 /month

Provider: Lycamobile

120 GB Lycamobile Lycamobile

£10 /month

Data: 120 GB
Provider: Lycamobile

National Plus Lycamobile

£10 /month

Unlimited allowances subject to fair usage policy. 12 and 24-month PAYG options available with discounted pricing

Data: 30GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming included
Network: 5G
Contract: No contract
Payment Plan: Prepaid
5G: Yes

12GB Lite 24M Three

£10 /month

Annual price increases apply from 1 April each year

Data: 12GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming available
Network: 5G
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

25GB 24 month Asda Mobile

£10 /month

99% UK population coverage using Vodafone network

Data: 25GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming available
Network: 5G
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

50GB Bundle 1pMobile

£10 /month

Data: 50GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming*
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

30GB 1-Month SIM Mozillion

£10 /month

T&Cs apply. Runs on the UK's Best Network (RootMetrics 2025 winner). No mid-contract price rises.

Data: 30GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming in 41 countries. Data limit: 25% of allowance (7.5GB).
Network: 5G Uncapped
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

40GB Data Plan Sky Mobile

£10 /month

Data plan price may increase during 12-month minimum term.

Data: 40GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roaming Passport Plus pass available for a daily charge in 55 select destinations, including the EU.
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

80GB (Promo) SMARTY

£10 /month

EU roaming subject to 12GB fair use limit.. Monthly rolling contract, cancel anytime.. Extra Data: 80GB (originally 40GB)

Data: 80GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Includes EU roaming (12GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

Blue Plus Talk Home Mobile

£10 /month

No Mid Contract Price Rises until 2026

Data: 30GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU Roaming included (EU/EEA, Australia, San Marino, Ukraine)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

Blue Max 12 Talk Home Mobile

£10 /month

No Mid Contract Price Rises until 2026

Data: 40GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU Roaming included (EU/EEA, Australia, San Marino, Ukraine)
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

Blue (PAYG Bundle) Talk Home Mobile

£10 /month

Data: 20GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU Roaming included (EU/EEA, Australia, San Marino, Ukraine)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Prepaid
5G: Yes

50GB 12 month SIM iD Mobile

£10 /month

Which? 'Great Value' endorsed network

Data: 50GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming available
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

Chattr 5GB Chattr

£10 /month

Data: 5GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming in 40+ countries
Network: 5G on O2
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

80GB SIM (12 month) Three

£10 /month

Data: 80GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Go Roam included
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

80GB SIM (12 month) O2

£10 /month

Data: 80GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roam up to 25GB in 48 destinations
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

30GB 30-Day Plan Lebara

£10 /month

Customers save average £12/month when switching from big networks

Data: 30GB
Calls & SMS: Unlimited calls & texts
EU Roaming: International calling included
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Prepaid
5G: Yes

25GB 18 month contract giffgaff

£10 /month

Data: 25GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming up to 5GB
Network: 5G
Contract: 18 months
Payment Plan: Postpaid
5G: Yes

20GB Monthly rolling giffgaff

£10 /month

Data: 20GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming up to 5GB
Network: 5G
Contract: 1 month (rolling)
Payment Plan: Postpaid
5G: Yes

Grade Mobile 10GB 12M Grade Mobile

£10 /month

10GB SIM-only on EE 5G.

Data: 10GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming included (fair use)
Network: 5G on EE
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

Price VOXI

£10 /month

Data: 20 GB
Contract: No contract
Provider: VOXI

50GB Data Plan Sky Mobile

£11 /month

Data plan price may increase during 12-month minimum term.

Data: 50GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roaming Passport Plus pass available for a daily charge in 55 select destinations, including the EU.
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

12GB data SIM only deal - 12 month contract Tesco Mobile

£11 /month

Non-Clubcard Price deals are subject to an annual price increase.. Plans subject to Fair Usage Policy.

Data: 12GB
Calls & SMS: Unlimited calls & texts
EU Roaming: No EU Roaming fees
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

Chattr 25GB Chattr

£11 /month

Data: 25GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming in 40+ countries
Network: 5G on O2
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

Grade Mobile 10GB 30D Grade Mobile

£11 /month

10GB SIM-only on EE 5G.

Data: 10GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming included (fair use)
Network: 5G on EE
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

Rewild 4GB 24M Rewild Mobile

£11.25 /month

Data: 4GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming available
Network: 4G & 5G
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

150GB SIM (12 month) Talkmobile

£11.95 /month

Data: 150GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming in 47 destinations (5GB fair use)
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

75GB SIM VOXI

£12 /month

Promotional data: was 25GB, now 75GB until 01/04. Offer on data allowance continues until you change or cancel your plan. 30-day rolling plans with no credit checks

Data: 75GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming included
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Prepaid
5G: Yes

100GB 24-Months SIM Mozillion

£12 /month

T&Cs apply. Runs on the UK's Best Network (RootMetrics 2025 winner). No mid-contract price rises.

Data: 100GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming in 41 countries. Data limit: 25GB.
Network: 5G Uncapped
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

25GB Lite 24M Three

£12 /month

Annual price increases apply from 1 April each year

Data: 25GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming available
Network: 5G
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

25GB 12 month Asda Mobile

£12 /month

99% UK population coverage using Vodafone network

Data: 25GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming available
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

30GB Plan (Popular) Ecotalk

£12 /month

All mobile plans are on 30-day rolling contracts.. Roaming in Europe for £2 per day.. Worldwide data roaming limit of £40 per month.

Data: 30GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Europe roaming for £2 per day
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

100GB SMARTY

£12 /month

EU roaming subject to 12GB fair use limit.. Monthly rolling contract, cancel anytime.

Data: 100GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Includes EU roaming (12GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

Silver Max 12 Talk Home Mobile

£12 /month

No Mid Contract Price Rises until 2026

Data: 60GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU Roaming included (EU/EEA, Australia, San Marino, Ukraine)
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

Chattr 50GB Chattr

£12 /month

Data: 50GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming in 40+ countries
Network: 5G on O2
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

26GB Monthly rolling giffgaff

£12 /month

Data: 26GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming up to 5GB
Network: 5G
Contract: 1 month (rolling)
Payment Plan: Postpaid
5G: Yes

50GB 18 month contract giffgaff

£12 /month

Data: 50GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming up to 5GB
Network: 5G
Contract: 18 months
Payment Plan: Postpaid
5G: Yes

Grade Mobile 30GB 24M Grade Mobile

£12 /month

30GB SIM-only on EE 5G.

Data: 30GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming included (fair use)
Network: 5G on EE
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

175GB iD Mobile

£12 /month

Data: 175 GB
Provider: iD Mobile

4 GB (30-day) Honest Mobile

£12.15 /month

5 days free EU roaming per trip. Monthly bill drops every month until it reaches the loyalty discount floor of £9.45.

Data: 4 GB
Calls & SMS: Unlimited UK calls calls, Unlimited UK texts texts
EU Roaming: 5 days free EU roaming every trip (up to 4GB/month)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

4 GB (12-month) Honest Mobile

£12.15 /month

First 2 full months half price. 5 days free EU roaming per trip. 12-month contract with introductory half-price offer for the first 2 months.

Data: 4 GB
Calls & SMS: Unlimited UK calls calls, Unlimited UK texts texts
EU Roaming: Free EU roaming (5 days per trip, up to 4GB/month)
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

75GB Bundle 1pMobile

£12.50 /month

Data: 75GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming*
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

100GB 12-Months SIM Mozillion

£12.50 /month

T&Cs apply. Runs on the UK's Best Network (RootMetrics 2025 winner). No mid-contract price rises.

Data: 100GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming in 41 countries. Data limit: 25GB.
Network: 5G Uncapped
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

30GB data SIM only deal - 24 month contract Tesco Mobile

£12.50 /month

Non-Clubcard Price deals are subject to an annual price increase.. Plans subject to Fair Usage Policy.

Data: 30GB
Calls & SMS: Unlimited calls & texts
EU Roaming: No EU Roaming fees
Network: 5G
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

Unlimited & Family Bundle (Additional SIM) 1pMobile

£12.50 /month

Unlimited Fair Use Policy: we may slow down your speeds at busy locations if you use over 500GB per boost period.. Price for additional SIMs when added to a primary Unlimited SIM. Unlimited Fair Use Policy applies (500GB).

Data: Unlimited
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming*
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

spusu 70 spusu

£12.90 /month

Rolling monthly contract renews automatically. EU roaming includes Switzerland, Iceland, Liechtenstein, Moldova, Norway and Ukraine. Uses the EE network. All plans are 5G ready at no extra cost.

Data: 70 GB
Calls & SMS: Unlimited calls & texts
EU Roaming: 15 GB data, 500 minutes and 500 SMS in EU & Switzerland
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

100GB 1-Month SIM Mozillion

£13 /month

T&Cs apply. Runs on the UK's Best Network (RootMetrics 2025 winner). No mid-contract price rises.

Data: 100GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Free EU roaming in 41 countries. Data limit: 25GB.
Network: 5G Uncapped
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

50GB 24 month Asda Mobile

£13 /month

99% UK population coverage using Vodafone network

Data: 50GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming available
Network: 5G
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

40GB Data Only SMARTY

£13 /month

EU roaming subject to 12GB fair use limit.. Monthly rolling contract, cancel anytime.. Tablet and Mobile Broadband SIM

Data: 40GB
Calls & SMS: Data Only calls, Data Only texts
EU Roaming: Includes EU roaming (12GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

30GB data SIM only deal - 12 month contract Tesco Mobile

£13 /month

Non-Clubcard Price deals are subject to an annual price increase.. Plans subject to Fair Usage Policy.

Data: 30GB
Calls & SMS: Unlimited calls & texts
EU Roaming: No EU Roaming fees
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

Child safe SIM deal - 1 month contract (12GB) Tesco Mobile

£13 /month

Non-Clubcard Price deals are subject to an annual price increase.. Plans subject to Fair Usage Policy.

Data: 12GB
Calls & SMS: Unlimited calls & texts
EU Roaming: No EU Roaming fees
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

60GB Data Plan Sky Mobile

£14 /month

Data plan price may increase during 12-month minimum term.. Promotional price of £14, standard price is £22.

Data: 60GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Roaming Passport Plus pass available for a daily charge in 55 select destinations, including the EU.
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

30GB Plan Ecotalk

£14 /month

All mobile plans are on 30-day rolling contracts.. Roaming in Europe for £2 per day.. Worldwide data roaming limit of £40 per month.

Data: 30GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Europe roaming for £2 per day
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

40GB Lite 24M Three

£14 /month

3 months half price when you switch. Price increases to £15.90/£17.80/£9.15 from 1 Apr 26 and further increases on 1 Apr 27

Data: 40GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming available
Network: 5G
Contract: 24 months
Payment Plan: Postpaid
5G: Yes

25GB Data (12 Months) Asda Mobile

£14 /month

Data: 25 GB
Minutes: Unlimited
Contract: 12 months
Provider: Asda Mobile

Unlimited 18 month contract (promo) giffgaff

£14 /month

Data: Unlimited
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming up to 5GB
Network: 5G
Contract: 18 months
Payment Plan: Postpaid
5G: Yes

Grade Mobile 30GB 12M Grade Mobile

£14 /month

30GB SIM-only on EE 5G.

Data: 30GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming included (fair use)
Network: 5G on EE
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

spusu 100 spusu

£14.90 /month

Rolling monthly contract renews automatically. EU roaming includes Switzerland, Iceland, Liechtenstein, Moldova, Norway and Ukraine. Uses the EE network. All plans are 5G ready at no extra cost.

Data: 100 GB
Calls & SMS: Unlimited calls & texts
EU Roaming: 20 GB data, 500 minutes and 500 SMS in EU & Switzerland
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

200GB (Promo) SMARTY

£15 /month

EU roaming subject to 12GB fair use limit.. Monthly rolling contract, cancel anytime.. Extra Data: 200GB (originally 150GB)

Data: 200GB
Calls & SMS: Unlimited calls & texts
EU Roaming: Includes EU roaming (12GB fair use limit)
Network: 5G
Contract: 30 days (rolling)
Payment Plan: Postpaid
5G: Yes

National Plus XL Lycamobile

£15 /month

Unlimited allowances subject to fair usage policy. 30-day PAYG plans. 12 and 24-month options available with discount

Data: 60GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming included
Network: 5G
Contract: No contract
Payment Plan: Prepaid
5G: Yes

50GB 12 month Asda Mobile

£15 /month

99% UK population coverage using Vodafone network

Data: 50GB
Calls & SMS: Unlimited calls & texts
EU Roaming: EU roaming available
Network: 5G
Contract: 12 months
Payment Plan: Postpaid
5G: Yes

What is a SIM-only deal in the UK?

A SIM-only deal gives you a mobile plan — data, calls, and texts — without a new phone. You keep your existing handset (or buy one separately) and pay only for the airtime. Because there's no device cost bundled in, SIM-only plans are significantly cheaper than phone contracts, typically saving £15–£30 per month compared to a handset deal with the same allowances.

The UK mobile market is served by four main network operators — EE, Three, Vodafone, and O2 — plus a thriving ecosystem of MVNOs (Mobile Virtual Network Operators) including giffgaff, VOXI, iD Mobile, Lycamobile, Lebara, and Asda Mobile. MVNOs use the infrastructure of the big four but often undercut them on price, making the UK one of Europe's most competitive mobile markets.

Benefits of choosing a SIM-only deal

Lower monthly cost — Without a phone to finance, SIM-only plans start from as little as £5/month for basic plans with 5–10 GB, rising to around £20–£26/month for unlimited data on a major network.

Flexibility — Many UK plans offer 30-day rolling contracts, meaning you can switch or cancel anytime. Longer 12-month, 18-month, and 24-month contracts often come with lower monthly rates or more data as a trade-off for commitment.

5G at no extra cost — Most UK operators now include 5G access on SIM-only plans at no additional charge, provided you have a 5G-capable device and are in a 5G coverage area. EE, Three, Vodafone, O2, and many MVNOs all offer 5G.

Keep your number — Switching provider is straightforward in the UK thanks to the PAC (Porting Authorisation Code) system. You can request a PAC via text and your number transfers within one working day.

Contract types in the UK

30-day rolling — Maximum flexibility. Cancel or change anytime with 30 days' notice. Popular with giffgaff, VOXI, Lycamobile, and Lebara. Ideal if you're unsure how long you'll need a plan or want to try a network before committing.

12-month contracts — A good balance of price and commitment. Common with iD Mobile, Asda Mobile, and O2. Often cheaper per month than rolling plans.

18-month and 24-month contracts — The lowest monthly rates, offered by EE, Three, and giffgaff. Best if you're happy to commit for the long term. Watch out for annual price rises (see below).

Annual price rises

A key consideration in the UK market is mid-contract price increases. Most major operators (EE, Three, Vodafone, O2) increase monthly prices annually — typically by CPI inflation plus an additional 3.9%. This means a £20/month plan could rise to £22+ after the first year. Some MVNOs like iD Mobile and giffgaff guarantee no mid-contract price rises, which can represent better value over a 24-month term.

EU roaming after Brexit

Since the UK left the EU, roaming guarantees are no longer legally required. However, most UK networks still include EU roaming at no extra cost, subject to fair-use data limits (often 25 GB per month). Some operators may charge for roaming or apply daily caps, so check the specific terms of your plan before travelling.

UK mobile network operators

EE is the UK's largest mobile network, part of BT Group. EE consistently ranks highest for 4G and 5G coverage and speed. SIM-only plans include features like data gifting to family members, and EU roaming is included as standard.

Three is known for generous unlimited data plans at competitive prices. Three pioneered unlimited data in the UK and offers strong 5G coverage in urban areas. The Three+ rewards app provides perks and discounts for customers.

Vodafone offers reliable UK-wide coverage and now benefits from network sharing with Three following their merger. Vodafone Together bundles allow families to combine broadband and mobile for additional savings, with plans from £16/month when bundled.

O2, part of Virgin Media O2, is popular for its O2 Priority rewards programme, which gives customers early access to event tickets and exclusive offers. O2's 5G rollout covers major UK cities.

MVNOs — budget-friendly alternatives

giffgaff runs on the O2 network and is famous for its no-contract approach, no credit checks, and community-driven support model. Plans are available on both 30-day rolling and 18-month terms, with bonus data often included on longer contracts.

VOXI is Vodafone's sub-brand aimed at younger users, offering 30-day rolling plans with unlimited social media, music, and video streaming data that doesn't count toward your allowance.

iD Mobile uses Three's network and has been endorsed by Which? for great value. A standout feature is the guarantee of no annual price rises during your contract, plus eSIM support.

Lycamobile and Lebara specialise in affordable plans with international calling minutes, making them popular with expat communities and international callers. Both offer 5G, eSIM, and no credit checks.

Asda Mobile runs on Vodafone's network with 99% UK population coverage. Features include data rollover (unused data carries to next month), Asda Rewards cashback, and the ability to upgrade your plan mid-contract.

Frequently asked questions

Can I keep my phone number when switching?
Yes. Text PAC to 65075 from your current SIM to receive a Porting Authorisation Code. Give this to your new provider and your number will transfer within one working day.

Do I need a credit check for a SIM-only plan?
Postpaid contract plans (12, 18, 24 months) typically require a credit check. Many MVNOs — including giffgaff, VOXI, Lycamobile, and Lebara — offer plans with no credit check required, usually on 30-day rolling terms.

What's the difference between 4G and 5G?
5G offers faster speeds (typically 100–300 Mbps, up to 1 Gbps in ideal conditions) and lower latency than 4G. Most UK operators include 5G at no extra cost on SIM-only plans. You'll need a 5G-capable phone and be in a 5G coverage area to benefit.

What does "unlimited" data really mean?
Most UK unlimited data plans are truly unlimited for personal use. Some operators apply a fair-use policy (e.g., speeds may be reduced after 600 GB/month on EE) to prevent abuse, but for the vast majority of users, unlimited means unlimited.

The cheapest Mobile SIM Plans in United Kingdom is £1 /month from 1pMobile.

Mobile SIM Plans in United Kingdom — FAQ

What is the cheapest SIM-only deal in United Kingdom right now?

Giraffy tracks 231 live SIM plans across 22 networks in United Kingdom. The lowest tracked price is £1 /month. Sort by lowest price to see the cheapest options for your data needs.

Which network has the best coverage in United Kingdom?

Coverage quality varies by area and carrier. Check each network's official coverage map before switching — indoor coverage, rural reach, and 5G availability differ significantly between operators in United Kingdom.

What is eSIM and do I need a physical SIM card?

An eSIM is a digital SIM embedded in your device — you activate a plan without swapping a physical card. Most flagship and mid-range phones released after 2020 support eSIM. Check your device settings or ask the carrier to confirm compatibility before you switch.

Is 5G worth it on a SIM-only plan?

5G delivers significantly faster download speeds and lower latency than 4G — typically 100–500 Mbps versus 20–50 Mbps. It's worth it if your handset is 5G-capable and you're in a coverage area. Most 5G plans are now priced similarly to 4G equivalents.

Can I keep my phone number when switching networks?

Yes. In most markets you can port your number to a new network within one working day by requesting a PAC or porting code from your current provider. The switch happens automatically once you activate the new SIM.

What is the difference between prepaid and pay-monthly SIM plans?

Prepaid (pay-as-you-go) plans require no contract — you top up credit and use what you pay for. Pay-monthly plans bill you at the end of each month and typically offer more data for the same price, but require a credit check and a rolling or fixed-term commitment.

Do I need to unlock my phone before switching networks?

If your handset was purchased directly from a carrier, it may be network-locked and need unlocking before accepting a different SIM. Phones bought from manufacturers or retailers are usually unlocked. Contact your current carrier to check — unlocking is often free or available for a small fee.