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How to install an eSIM step by step
Quick answer: Buy the plan, scan the QR code or follow the provider's app instructions while you have Wi-Fi, label the line, then on arrival set the eSIM as your data line and turn data roaming on for it. Turn data roaming off on your UK SIM.
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Before you start
- Make sure your phone supports eSIM and is unlocked.
- Install while you have a good Wi-Fi connection, because the profile has to download.
- Keep the QR code or install details safe. Most can be used only once, so do not delete the profile.
Steps on an iPhone
- Open Settings, then Mobile Service (or Mobile Data), then Add eSIM.
- Scan the QR code from the provider, or enter the details if asked.
- Label the line, for example Travel.
- Choose which line is used for data. Set Travel as the line for mobile data when you arrive.
- Turn Data Roaming on for the Travel line only.
Steps on Android
The names vary between makes. Look under Settings, then Connections or Network and internet, then SIM manager, and choose Add eSIM or Download a SIM. Scan the QR code and name the line. Then choose the eSIM for mobile data and turn on data roaming for it.
Avoid surprise charges
- Turn data roaming off on your UK SIM so the phone does not use it.
- Keep the UK line on for calls and texts if you want to receive them, and check what your network charges.
- Check you have no automatic renewals on the eSIM.
If you are still choosing, see best eSIM providers compared.
Some links here are affiliate links: we may earn a small fee if you buy, at no extra cost to you.
Frequently asked questions
When should I install the eSIM?
Before you leave if the provider allows, so it is ready when you land. Some plans start counting days when you first connect, so check the activation rules.
What if the QR code fails?
Check you are online and the phone is unlocked, then try the provider's manual install details or support. Do not delete the profile.
Will I still get calls on my UK number?
Usually yes, if the UK line stays on. Check your network's charges for receiving calls abroad.
Keep reading
- What is an eSIM, and does my phone support it?
- eSIM vs roaming vs local SIM
- How much mobile data do you need abroad?
- UK network roaming charges explained
- Keep your UK number abroad
- Best eSIM providers for travel, compared
Checked 12 November 2026. Prices, plans, airline and country rules change, so check the official or provider page before you rely on anything here.