The short answer: which Belgium eSIM do you need? For most US and UK travelers on a 4-to-14 day trip, the Airalo Belganet eSIM is the best all-around pick. Plans start at $4.50, it routes through Base and Proximus for solid 4G/5G in cities and on trains, and install is a one-tap QR. If your trip includes a Eurostar leg to London, you need a UK-inclusive plan like the Bouygues MyEuropean eSIM to stay connected through the Channel Tunnel — EU-only profiles die at Folkestone. Which Belgium eSIM fits your trip? Your right answer depends on the trip shape. Are you a weekend city-breaker, a Eurostar commuter, or a heavy hotspot user? Match your profile to the table below. Your traveler profile — Our recommended pick — Why it's the best fit The weekend warrior (4-day city break) — Airalo Belganet 1 GB / 7 days — Cheapest way to cover maps, messaging, and social for a short Brussels or Bruges stay. The classic tourist (7-14 days, multiple cities) — Airalo Belganet 5 GB / 30 days — The sweet spot. Ample data for navigation, restaurant searches, and ticket booking. The business traveler (laptop hotspot) — Jetpac 10 GB / 30 days — Generous bucket, transparent hotspot rules — fine for working off your laptop. The Eurostar London commuter — Bouygues MyEuropean 30 GB — Non-negotiable. Bouygues explicitly includes the UK; your data survives the tunnel. The EU explorer (adding Paris or Amsterdam) — Bouygues or Orange Holiday Europe — Regional plans cover the EU (plus UK for Bouygues), so no swap at the border. The heavy data user (streaming, remote work) — Holafly Unlimited (with caveats) — "Unlimited" with a 1.5 GB/day fair-use cap and tight hotspot limits. See our Airalo vs Holafly comparison. Belgium eSIM plans compared Here's a side-by-side of the most popular data-only eSIM plans for Belgium. We've highlighted our top picks for the average tourist and the cross-channel traveler. Provider — Data — Validity — Price (USD) — Hotspot Airalo Belganet — 1 GB — 7 days — $4.50 — Yes Saily — 1 GB — 7 days — $3.99 — Yes Nomad — 1 GB — 7 days — $4.50 — Yes aloSIM — 1 GB — 7 days — $4.50 — Yes Airalo Belganet (best value) — 5 GB — 30 days — $12.50 — Yes Saily — 5 GB — 30 days — $10.99 — Yes Nomad — 5 GB — 30 days — $14.00 — Yes Jetpac — 10 GB — 30 days — $13.00 — Yes Bouygues (best for UK) — 30 GB — 30 days — ~$32.00 — Yes Orange Holiday Europe — 70 GB — 28 days — ~$55.90 — Yes (+ EU number) Holafly — Unlimited — 30 days — ~$74.90 — Limited (FUP) Brussels 5G and the radiation cap reality Your phone will proudly display a 5G icon in Brussels. The performance, though, might not match what you get at home — and the cause is regulatory, not technical. The Brussels-Capital Region enforces some of the strictest electromagnetic radiation limits in the world. The cap was recently revised from an obsolete 3 V/m to a more modern 14.5 V/m, but that's still well below Flanders (20.6 V/m), Wallonia (18.4 V/m), and the EU ICNIRP guideline of 41.25 V/m used across most of the bloc. In practice, this forces Proximus and Telenet/BASE to run their 5G cells at lower power. Outdoor speeds hold up; indoor reception in older masonry buildings drops fast. > 🌍 Local insight: Your phone shows 5G in Brussels, but the regional 14.5 V/m radiation cap forces low-power cells. Indoor coverage in older masonry buildings drops to 4G LTE on the 800 MHz band quickly. Eurostar, SNCB trains, and the Channel Tunnel cliff Traveling between Belgian cities by train is a breeze, and Eurostar makes hopping to London, Paris, or Amsterdam simple. Connectivity, though, has some sharp edges. On SNCB trains, average 4G coverage is excellent — around 98.2%, with median downloads near 55 Mbps along main lines. The catch is the newest M6 double-decker stock: metallized window coatings block cell signals. After scrapping a €160 million onboard Wi-Fi project in early 2024, SNCB now runs a €40 million program to laser-etch microscopic grids into windows to restore reception. Expect brief dead zones in the major Brussels tunnels: the North–South junction (3.8 km) and Schuman–Josaphat (1.25 km). The real challenge is Eurostar to London. The Channel Tunnel carries 4G via Vodafone UK, EE, Bouygues, Orange, and SFR — live since 2014, no 5G yet — but it's a hard border for billing. > ⚠️ Heads up: EU-only eSIMs lose data at the Channel Tunnel's UK portal in Folkestone. Only plans explicitly including the UK — like the Bouygues MyEuropean eSIM — survive the crossing. If you're only going to Paris or Amsterdam, any EU-regional eSIM works fine. For more, see our guide to pan-EU regional plans and the Belgium to Amsterdam Eurostar handoff. East Cantons, Hautes Fagnes, and the Three-Borders Triangle If your trip pushes east toward the German and Dutch borders, your phone may behave strangely. The "Drielandenpunt" — where Belgium, Germany, and the Netherlands meet — is a hot spot for network ping-ponging. Across the 30 km radius between Liège, Aachen, and Maastricht, your device will jump between Proximus (BE), Vodafone DE, and KPN NL. The constant searching drains battery. A similar effect happens in the Hautes Fagnes nature reserve, where German Vodafone signal bleeds across the border near Signal de Botrange, Belgium's highest point at 694 m. > 💡 Tip: Manually lock your carrier in iOS or Android Cellular settings when driving the Liège–Aachen–Maastricht triangle. Pin it to your eSIM's partner network (typically Proximus) to stop the Proximus/Vodafone DE/KPN ping-pong drain. For more on this corridor, see our eSIM Germany guide. When a local Belgian SIM beats an eSIM For a 4-to-14 day vacation, an eSIM almost always wins on convenience. You can buy and install it from your couch before leaving home. If you're staying a month or more and need a local phone number, a physical SIM is worth considering. Mobile Vikings — a Proximus Group MVNO — offers competitive rates on the Proximus network at around €1.50/GB on 10 GB tiers. The hey! Telecom brand, owned by Orange Belgium, is another option. The friction is the catch. Under a 2016 anti-terror law, you must present your passport for in-person registration to activate any local Belgian SIM. That means finding a store, queuing, and likely navigating a language barrier. For most tourists and business travelers, the activate-on-arrival simplicity of an eSIM beats the marginal cost savings. Frequently asked questions about eSIM for Belgium Can I get an eSIM for Belgium with a phone number? Most travel eSIMs (Airalo Belganet, Nomad) are data-only. If you need a European phone number for calls and texts, choose a premium option like Orange Holiday Europe. Which mobile networks do Belgium eSIMs use? They roam on the top local networks. Airalo Belganet uses Base and Proximus. Saily uses Telenet, Orange, and Proximus. Proximus has the strongest nationwide and rural coverage; Telenet/BASE is denser in Flemish cities. Should I activate my eSIM before I land in Brussels? Install the eSIM profile at home on stable Wi-Fi. Then switch it on the moment you land at Brussels Airport (BRU). The Airalo validity timer doesn't start until your phone hits a Belgian PLMN, so installing early costs you nothing. Will my eSIM work well in Bruges and Ghent? Yes. Coverage from all major carriers is excellent in Belgium's main tourist cities. You'll have reliable 4G/5G for navigation, museum hours, and posting canal photos. Is 5G widely available in Belgium? Yes, all three major operators have rolled out 5G, with Proximus claiming ~92% population coverage. Just remember the Brussels caveat from the radiation cap section above. Can I use my Belgium eSIM as a mobile hotspot? Yes. Most data-only eSIMs — Airalo Belganet, Nomad, Jetpac, Saily — fully support hotspotting and tethering. The main exception is Holafly, which restricts hotspot data and speed under its Fair Use Policy. Last updated 2026-05-21.