How travel eSIMs work

An eSIM is a SIM chip soldered into your phone. Instead of inserting a plastic card, you download a profile from a provider, usually by scanning a QR code or tapping an install link. Most recent phones can hold several eSIM profiles and switch between them.

What a travel eSIM actually is

A travel eSIM is a prepaid data plan sold by a company that has roaming agreements with networks in your destination. When you land, your phone connects to a local network as a roaming visitor, and the provider bills you up front instead of your home network billing you per megabyte.

Because it's roaming, the network you connect to is chosen from the provider's partners. That's why we show which networks each plan lists — some name all of them, some only one.

Data only, or calls and texts?

Most travel eSIMs are data only: no local phone number, no SMS. You can still call and message through internet apps. If you need to receive verification codes by SMS, keep your home SIM switched on alongside the eSIM — your phone can use both at once.

What to check before buying

1. Your phone supports eSIM and is carrier-unlocked. Use our compatibility checker.
2. The plan covers every country on your trip — single-country plans stop at the border.
3. The validity covers your trip length, counted from activation.
4. For unlimited plans: the fair-use and hotspot rules, if the provider documents them.
5. When the plan starts: on install, or when it first connects at your destination.

When a travel eSIM isn't the best choice

• Your home plan includes roaming — for example, EU SIMs roaming within the EU.
• Long stays: a local SIM is usually cheaper over a month or more.
• Your phone was bought in a market where models lack eSIM, such as many phones sold in mainland China.