How eSIMs work — setup guide

An eSIM is a digital SIM built into your phone. Instead of a plastic card, you install a travel data plan as a QR code or a profile — usually in a couple of minutes — and get online abroad without roaming charges or swapping your home SIM.

How a travel eSIM works

• Your home number stays active. A travel eSIM runs alongside your normal SIM, so you keep receiving calls and 2FA texts on your usual number while using the eSIM for data.
• You buy data, not a contract. Plans are prepaid for a set amount of data (for example 5 GB) over a set validity window (for example 30 days).
• It activates on arrival. Install before you travel; the plan typically starts when it connects to a local network at your destination.

Before you buy: three checks

1. Is your phone eSIM-ready and carrier-unlocked? Use our device compatibility check. A quick test: dial *#06# — if an EID number is shown, your phone supports eSIM.
2. How much data do you actually need? Our Smart Data Advisor estimates your need from your trip length and habits, so you don't overpay for data you can't use.
3. Does the plan cover your destination for your dates? Check the country and that the validity period is at least as long as your trip.

Setting up your eSIM (general steps)

1. Buy the plan from the provider and open the confirmation with your QR code.
2. On iPhone: Settings → Mobile Service / Cellular → Add eSIM → Use QR Code. On Android (Pixel/Galaxy): Settings → Network & internet → SIMs → Add eSIM.
3. Scan the QR code and follow the prompts to install the plan.
4. Label the line (e.g. "Travel") and set it for data. Turn on Data Roaming for the eSIM line (this just lets the travel plan use the local network — it is not your home carrier's roaming).
5. Keep your home line for calls/texts and turn its data off to avoid home-carrier charges.

About "unlimited" plans

"Unlimited" eSIMs usually apply a daily high-speed cap, fair-use throttling, or tethering limits once a threshold is passed. Where we cannot confirm those conditions from the provider's own data, we mark them "needs checking" rather than guess. Always read the plan's conditions before you rely on it for hotspot or heavy use.

Tripamio gives independent guidance; the eSIM itself is sold and activated by the provider. See our affiliate disclosure.