Europe — Read the full guide

A regional plan works differently from what most people picture. You install a single profile, and as you cross borders it attaches to whichever local network the underlying operator has an agreement with in that country. There is nothing to swap, no second QR code, no settings to change at the border — the phone simply hunts for a new network and registers on it, usually within a minute or two of crossing. Your data allowance is shared across every country on the list rather than being divided per country, so a week in Italy and a week in Croatia both draw from the same pool.

The country list is the product, and it is the thing to read before buying. A plan called "Europe" is not automatically all of Europe, geographic or political. Switzerland, Norway and Iceland are not in the EU, and the UK left it — all four appear on some regional lists and are missing from others, and they are exactly the destinations travellers assume are covered. The EU's "roam like at home" rules do not help here: those apply to consumer SIMs issued by an EU operator to its own subscribers, not to travel eSIMs sold to visitors. Open the coverage list and find each country you are actually visiting by name.

Coverage on a multi-country trip has its own patterns. Alpine passes and valleys drop out routinely, so download the route before you drive over one. Long rail journeys are the classic problem: cross-border trains leave the phone hunting for a new network for a while, and even within a country a high-speed line through cuttings and tunnels will flicker. Ferries in the Mediterranean and the Baltic lose land coverage some way offshore and may hand you an expensive maritime network instead — turn data off before you sail. And 5G availability varies enormously, not just between countries but between a capital and a town an hour away in the same one.

For data planning, treat each country as its own preparation step. Download offline maps per country over hotel Wi-Fi rather than pulling them over cellular as you arrive, because that single habit removes most of the drain. Rail apps hold tickets and QR codes that you need to produce on a platform with no signal, so screenshot or download them rather than trusting a live load. Once you are visiting three or more countries, a regional plan usually beats juggling several single-country profiles — not because it is technically better, but because you stop managing installs, expiry dates and top-ups mid-trip, which is where things actually go wrong.