Best eSIM for Belgium — Prepaid Data Plans & Prices

By Flavia Voican · Updated 2026-04-10

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eSIM Guide for Belgium

Belgium’s eSIM scene is simple but limited. Airalo and Holafly are your main options—local eSIMs are rare for tourists. Proximus (Belgium’s largest carrier) doesn’t offer public eSIMs. Here’s the breakdown:

• Airalo: Best value. $7.99 for 3GB/7 days (covers Proximus network). $14.99 for 10GB/30 days. Works at airports (Brussels Zaventem) and hotels.
• Holafly: $8.99 for 3GB/7 days. Same Proximus coverage. App is reliable but requires Wi-Fi for activation (no cellular data during setup).
• Local eSIMs: None for tourists. T-Mobile Belgium offers eSIMs but only to existing customers with Belgian IDs.

Coverage & Activation

Both Airalo and Holafly piggyback on Proximus (Belgium’s strongest network). Coverage is excellent in cities (Brussels, Antwerp, Ghent) and decent in rural areas. Avoid the Ardennes for calls, but data’s fine.

Activation: Download the app, scan the QR code, and activate via Wi-Fi. For dual-SIM phones: Set the eSIM as your primary (not the physical SIM) to avoid roaming fees. Proximus won’t let you use a local SIM + eSIM simultaneously—use eSIM only.

Physical SIM: Buying & Top-Up Guide

Operators & Where to Buy

Belgium has four major operators. Always buy a tourist SIM (not a contract):

• Proximus (Market leader, best coverage)
• Orange (Good for cities, cheaper plans)
• BASE (Budget-friendly, weaker rural coverage)
• T-Mobile (Virtual carrier, uses Proximus network)

Where to buy (Avoid airport counters—they’re 2x the price!):

• Convenience stores: Carrefour (all locations), Delhaize (large supermarkets), Colruyt (budget chain). Buy at checkout. Cost: €10-€12 for a starter pack (€5 data + €5 credit).
• Electronics stores: MediaMarkt, Boulanger, Cdiscount. Staff speak English. Buy at the SIM counter (not the main store).
• Carrier shops: Proximus stores (look for blue logo), Orange shops (orange logo). Less tourist-friendly.

How to Top Up (The REAL Problem)

This is where tourists get stuck. Forget apps—Belgium’s top-up systems are confusing for foreigners. Here’s how to actually do it:

1. Convenience Stores (Best Option)

Go to Carrefour, Delhaize, or Colruyt. Ask for a top-up voucher (e.g., "Un coupon pour recharger ma carte"). Buy a €10 or €20 voucher (sold as a scratch card). You’ll get a code like "1234567890".

2. USSD Codes (For Immediate Top-Up)

Use these before your data runs out. Dial from your phone (no app needed):

• Proximus: 111# (check balance), 112# (buy 1GB for €5)
• Orange: 999# (check balance), 998# (buy 1GB for €5)
• BASE: 123# (check balance), 124# (buy 1GB for €5)

Important: Dial the code from the SIM you’re topping up. If you use 111#, it’ll show your balance. Then dial 112# to buy data.

3. Online & Apps (Use Caution)

• Proximus App: Only works if you’re logged in (requires Belgian ID/email). Don’t waste time trying.
• Orange App: Same issue—requires Belgian phone number. Avoid.
• Online top-up: Sites like proximus.be only accept Belgian credit cards. Foreign cards get rejected.

4. Top-Up Voucher Cards

Find these at Carrefour, Delhaize, or newsstands (called "Carte de recharge" or "Voucher"). Buy the exact value you want (€5, €10, €20). Scratch off the code and text it to the number on the card (e.g., "1234567890" → text to 1234).

Common Problems Tourists Face

• Language barrier: Store staff only speak French/Dutch. Say "Je veux recharger ma carte" (French) or "Ik wil mijn kaart opladen" (Dutch). If they don’t understand, point to the voucher and say "€10 voucher".
• Apps won’t work: Proximus/Orange apps require Belgian bank accounts. Never use them.
• Credit cards rejected: All carriers block foreign cards for online top-ups. Only use cash for vouchers.
• Stuck with no data: Your SIM dies after 3 days if not topped up. Don’t wait until data’s gone!

Pro Tip: If You’re Stuck with No Data

1. Go to Carrefour or Delhaize immediately. Buy a €5 voucher (not €10—save cash). 2. Text the code from the voucher to the number on the card (usually 1234 or 5555). 3. Wait 2 minutes—data activates. 4. **

Plan Your Trip

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