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What is an eSIM, and does my phone support it?
Quick answer: An eSIM is a SIM built into your phone that you set up by scanning a QR code or using an app, with no plastic card to swap. Many phones from around 2018 onward support one, but check your own phone and make sure it is unlocked.
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What an eSIM is
A normal SIM is a small card you put into the phone. An eSIM is a chip already inside the phone, and your plan is downloaded to it. Travel eSIM providers sell a data plan you can install before you leave, so you land with data working and no hunting for a local shop.
How to check your phone
- iPhone: go to Settings, then General, then About, and look for an entry such as Digital SIM or EID. iPhones from around 2018 (XS and XR) onward generally support eSIM.
- Android: go to Settings and look under SIM manager or Network and internet for an option to add an eSIM. Many recent Samsung Galaxy and Google Pixel phones support it, but models differ.
- Dial *#06# and look for an EID number. If one appears, the phone has eSIM hardware.
It must be unlocked
Your phone has to be network-unlocked to use another provider's eSIM. If you pay for your phone monthly, ask your network whether it is unlocked.
Why travellers use them
- You install before you leave, so data works on landing.
- You keep your UK SIM active for calls and texts, if your phone supports two lines.
- No plastic SIM to swap or lose.
Next, read eSIM vs roaming vs a local SIM and how to install an eSIM.
Some links here are affiliate links: we may earn a small fee if you buy, at no extra cost to you.
Frequently asked questions
Do all phones support eSIM?
No. Many newer phones do, but older and some budget phones do not. Check your own phone's settings or the manufacturer's page.
Can I use an eSIM and my UK SIM together?
Most eSIM phones support two lines at once, so you can keep your UK number for calls and texts and use the eSIM for data.
What if my phone is locked to my network?
You will need to ask your network to unlock it before you can use another provider's eSIM.
Keep reading
- eSIM vs roaming vs local SIM
- How to install an eSIM step by step
- Best eSIM providers for travel, compared
- How much mobile data do you need abroad?
- UK network roaming charges explained
- Keep your UK number abroad
Checked 12 November 2026. Prices, plans, airline and country rules change, so check the official or provider page before you rely on anything here.