What is an eSIM?

How eSIMs work, which phones have them, and why they're usually the cheapest way to get data abroad.

How to set up an eSIM

Step by step for iPhone, Samsung and Google Pixel, plus the settings that stop surprise roaming bills.

How much data do I need?

Our calculator works out your monthly data, and how much you need for a trip.

How to avoid roaming bill shock

Ferries, Greek islands, North Cyprus and the other traps that catch UK travellers out.

Switch network and keep your number

The free text codes that make switching take one working day.