Compare Mobile SIMs in Belgium

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51 live offers compared from 15 providers, from €3 /month. Updated daily.

What is Mobile SIMs in Belgium?

A mobile SIM in Belgium gives you calls, texts and mobile data on one of the country's networks, either on a rolling monthly plan or a prepaid card. Plans are advertised in both French and Dutch, and the same offer applies whichever language you choose. Physical SIMs are still standard, though eSIM support is spreading across providers.

Monthly prices run from about €3 for a light prepaid bundle up to around €269 for premium plans with generous or unlimited data. Most people land in the middle, choosing a plan sized to their monthly data use rather than paying for allowances they never reach.

How the Belgian market works

Belgium has three mobile network operators (MNOs) that own infrastructure: Proximus, Orange and BASE (part of Telenet). Everyone else is a mobile virtual network operator (MVNO) that rents capacity from one of these three. Mobile Vikings, hey!, UNDO and Yoin are all MVNOs, each targeting different niches on price or brand.

The most disruptive recent arrival is DIGI, which entered as the country's fourth operator and pushed prices down sharply with aggressive data bundles. Number portability is straightforward: you keep your number when you switch, and the process is designed to complete quickly so you are rarely without service.

Benefits

Easy switching — Belgian number portability lets you move to BASE, Orange or an MVNO like Mobile Vikings while keeping your existing number.

Real competition — DIGI's arrival as a fourth player has driven larger data allowances and lower monthly prices across the market.

MVNO choice — Brands such as hey!, UNDO and Yoin ride the main networks but package data more cheaply or flexibly.

No lock-in — Most SIM-only plans are month-to-month, so you can leave or resize your plan without a long contract.

How to choose

Begin with how much data you actually use each month, then match a plan to that rather than the biggest allowance advertised. If you mostly use wifi at home and work, a small prepaid bundle from €3 may be plenty; heavy streamers should look at larger or unlimited plans.

Check which underlying network a provider uses, since coverage in your area matters more than brand. Look at whether calls and texts are unlimited, whether EU roaming is included, and if the plan is SIM-only or tied to a handset. Confirm eSIM availability if you want to activate instantly without a posted card.

Leading providers in Belgium

Proximus, Orange and BASE are the three network owners and offer the widest coverage and premium plans. DIGI is the value-led newcomer that reshaped pricing, while Mobile Vikings is a long-established MVNO popular for its data-generous packs and community brand.

hey! (Telenet's digital brand), UNDO and Yoin round out the challenger space, competing on simple app-based plans and keen monthly prices. Because the MVNOs run on the big three networks, you can often get near-identical coverage for less.

What it costs

Entry-level prepaid and small SIM-only plans start around €3 per month. Mid-range plans with a solid data allowance and unlimited national calls typically sit in the low-to-mid tens of euros. At the top, premium and unlimited-data plans reach up to around €269 per month.

Prepaid avoids any contract and lets you top up as needed, while monthly SIM-only plans usually offer more data per euro. Watch for introductory discounts that step up after a promotional period.

Protections and regulation

The telecoms regulator BIPT oversees the Belgian mobile market, managing spectrum, safeguarding number portability and enforcing consumer rules on transparency. Providers must let you keep your number when switching and give clear information on prices and contract terms.

EU "roam like at home" rules apply, so plans generally include roaming across the EU at domestic rates within fair-use limits. If a provider fails to meet its obligations, BIPT and the telecoms ombudsman handle complaints.

Common questions

Can I keep my number? Yes. Number portability is a legal right in Belgium, and switching to another provider keeps your existing mobile number.

Is DIGI cheaper than the big three? DIGI entered as a fourth operator with aggressive pricing, which has generally pushed data allowances up and prices down across the market.

Prepaid or monthly? Prepaid suits light or occasional users with no commitment; monthly SIM-only plans usually give more data per euro for regular users.

Mobile SIM Plans in Belgium — FAQ