O2 — United Kingdom
Live offers from O2 in United Kingdom, tracked daily by Giraffy.
Live offers
- 40GB SIM (12 month)
- 80GB SIM (12 month)
- 25GB SIM
- 40GB SIM
- 100GB SIM
O2 is the UK's second-largest mobile network, owned by Virgin Media O2. It offers SIM-only plans, pay monthly contracts, and the O2 Priority loyalty programme. O2's network runs 4G and 5G, and it powers MVNOs including giffgaff, Tesco Mobile, and Sky Mobile.
| Owner | Virgin Media O2 (50% Liberty Global, 50% Telefónica) |
|---|---|
| Network | 4G/5G — powers giffgaff, Tesco Mobile, Sky Mobile |
| Products | SIM only, pay monthly, O2 Priority rewards |
| Best for | UK users who value the O2 Priority loyalty programme and competitive plans |
| Alternatives | EE, Vodafone UK, Three |
Best for
- UK users who value O2 Priority (exclusive event tickets, restaurant offers)
- Those who want the same coverage as giffgaff/Tesco Mobile at similar or better pricing with perks
Not ideal for
- Budget data-heavy users — Three or Smarty offer cheaper unlimited plans
O2 vs alternatives
O2 vs EE
Widest 5G coverage nationally. O2 vs EE: EE leads on 5G coverage. O2 competes with Priority rewards and often cheaper SIM deals.
O2 vs giffgaff
Budget O2-network SIM. O2 vs giffgaff: giffgaff runs on the O2 network at a lower price point. For O2 Priority perks, stay on O2 directly.
O2 vs VOXI
Budget younger-user SIM on Vodafone network. O2 vs VOXI: Different networks. Compare plans on Giraffy.
O2 in United Kingdom — FAQ
What is O2 Priority?
O2 Priority is a loyalty scheme giving O2 customers early access to concert tickets, restaurant deals, and special offers. It is one of the most generous loyalty programmes on any UK network.