The multi-country problem
A two-week Interrail trip through five countries creates a genuine connectivity headache if you approach it country by country. Buying a new SIM or eSIM at every border means repeated setup, repeated cost, and a real risk of losing data access for the first few hours in each new country while you sort it out.
Regional eSIMs solve this directly
A regional Europe eSIM — offered by providers including WorldSIM, KnowRoaming and BambooSIM — covers many EU countries under a single data plan. You activate once before you leave, and your data simply keeps working as you cross from France into Germany into Austria, with no manual switching required.
What to check before choosing a plan
Country list: confirm your specific route is covered — most regional Europe plans cover the EU plus popular non-EU stops like Switzerland and the UK, but always check your exact itinerary against the provider's country list rather than assuming.
Data allowance vs trip length: a week of typical use (maps, messaging, some social media) generally needs 3-5GB. A two-week trip with regular video calls or streaming will need considerably more — factor in your actual habits rather than the bare minimum.
Unlimited vs fixed data plans: some providers offer unlimited data at a flat daily rate rather than a fixed GB allowance, which can work out better value on longer trips if you are a heavy data user.
Our recommendation
For most multi-country European trips, a single regional eSIM plan is both simpler and cheaper than the country-by-country alternative. Compare current options — including KnowRoaming and WorldSIM — before you travel, and check our eSIM compatibility guide if you are unsure whether your phone supports it.
Compare travel eSIM options for Europe →