eSIM for Belgium: when unlimited pays off and when it does not

The numbers, trip by trip

1. 3 days. Unlimited $12.60, 5 GB $11.52. Close, but the gigabytes last 30 days while unlimited ends with the trip.
2. 5 days. Unlimited $21.00, 10 GB $19.20, 20 GB $26.40. If you will not burn 10 GB in five days, unlimited is money wasted.
3. 7 days. Unlimited at $29.40 sits between 20 GB ($26.40) and 30 GB ($33.60). Using more than 20 GB in a week? Unlimited beats the largest plan.
4. 10 days. Unlimited at $35.93 already costs more than 30 GB at $33.60. If 30 GB is enough, the data plan wins from here on.
5. 30 days. $68.40 for unlimited against $33.60 for 30 GB: you overpay $34.80.

Unlimited can be bought for any length from 1 to 30 days; the lengths above are the ones priced on the Yesim page.

What a gigabyte costs

The bigger the plan, the cheaper each gigabyte: $3 in the 1 GB plan, about $2.30 in 5 GB, $1.92 in 10 GB, $1.32 in 20 GB and $1.12 in 30 GB.

So when torn between two neighbouring plans, the larger one is often the smarter buy. 20 GB for $26.40, for instance, beats two 10 GB plans at $38.40 combined. Belgium has no 3 GB plan of the kind Armenia offers.

BASE and Orange Belgium

The Yesim page for Belgium lists two networks, BASE and Orange Belgium, both marked 5G. Coverage cities include Brussels, Antwerp, Bruges, Ghent and Liège.

Tethering to a laptop is up to the operator. Very heavy use may be throttled under fair usage rules, unlimited included.

Worth knowing

• Data only: no Belgian number, no calls, no SMS.
• You have 180 days to activate after purchase; the plan clock starts when you connect.
• Top-ups are available if data runs out early.
• Belgium is part of the Europe & UK regional plan for 33 countries, handy if the trip goes beyond one country.

More on staying connected at home: internet and mobile in Yerevan.

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Data as of 22 October 2026. Prices and terms are set by the service; check them when booking.