How to activate an eSIM in the United Kingdom: full guide
How to activate an eSIM in the UK? Device compatibility, operators,
Since Brexit, roaming between the European Union and the United Kingdom is no longer automatically free: depending on your carrier, a single day of data across the Channel can be expensive. The simplest and cheapest way to stay connected in London, Edinburgh or Manchester is to activate an eSIM in the UK before you leave. Here is how to do it, step by step.
Why choose an eSIM for the United Kingdom?
An eSIM (embedded SIM) is a virtual SIM card already built into your device. You activate it by scanning a QR code, with no shop visit and no physical card to wait for. For a trip to the UK it offers three decisive advantages:
- No surprise roaming charges: you pay a fixed plan, known in advance.
- Instant activation: your data works the moment you land at Heathrow or Gatwick.
- You keep your number: the eSIM sits alongside your main SIM, which you keep for your usual calls and texts.
eSIM device compatibility in the United Kingdom
First, check the eSIM compatibility of the devices you are bringing to the United Kingdom. The technology is supported by the vast majority of recent smartphones:
- iPhone: every model from the iPhone XS / XR (2018) through the iPhone 16.
- Samsung Galaxy: the S series from the Galaxy S20, the Z Fold/Flip range, and some recent Galaxy A models.
- Google Pixel: from the Pixel 3 (some variants excluded), and all Pixel 6, 7, 8 and 9.
- Tablets: recent iPad Pro, iPad Air and iPad mini, plus several Android models.
Quick tip: dial `*#06#` on your phone. If an EID number appears next to the IMEI, your device supports eSIM. Also make sure it is unlocked (not tied to a carrier), which is essential to install a third-party eSIM.
How to activate your eSIM in the UK, step by step
Activation takes less than five minutes:
- Buy your plan on Datadopt by comparing the deals for the United Kingdom.
- Receive the QR code by email, usually within minutes.
- Open Settings → Cellular / Mobile Data → Add eSIM (iOS) or Settings → Connections → SIM manager (Android).
- Scan the QR code while you are still at home, connected to Wi-Fi.
- On arrival in the UK, turn on data for the eSIM line and switch off roaming on your main line to avoid any out-of-plan charges.
Install it before you leave: downloading the profile needs a connection, and it is more comfortable to do at home than at the airport.
eSIM operators in the United Kingdom
The UK relies on four physical networks: EE, O2, Vodafone and Three. You don't subscribe with them directly, but through travel eSIM providers that buy capacity on those networks. The main eSIM operators for the United Kingdom listed on Datadopt are:
- Airalo: the widest catalogue, with excellent small plans for short stays, hotspot included.
- Holafly: the reference for unlimited plans, ideal if you stream or work on the move.
- Ubigi: very good price-per-GB on stays of one to four weeks.
- Nomad, Saily, Airhub and others round out the comparison with often aggressive rates.
Each one runs on one or more of the four British networks: 4G/5G coverage is excellent in cities and good across most of the country.
The best eSIM deals in the United Kingdom
There is no single "best" deal, only the one that suits your usage. To find the best eSIM deals in the United Kingdom, think in terms of length and data volume:
- Short stay (1 to 5 days): a 1 to 3 GB plan from Airalo, or a 5-day Holafly unlimited.
- One to two weeks: 5 to 10 GB from Airalo or Ubigi, depending on your usage.
- Long stay (1 month): focus on the price per GB — Ubigi and Airalo are often the most competitive.
Our comparator automatically shows the price per GB and the price you actually pay (tax included), so you can decide at a glance.
👉 See the best eSIM deals for the United Kingdom on Datadopt
United Kingdom and Europe: regional plans
Combining the UK with a stay on the continent? No need to juggle several eSIMs. Several European operators offer regional eSIM plans that cover both the UK and the European Union with a single profile. It's the most practical option for a London–Paris–Amsterdam itinerary, for example.
One caveat, though: since Brexit the United Kingdom is no longer part of the European roaming zone. So check that the "Europe" regional plan you choose actually includes the United Kingdom in its country list — it's shown on every Datadopt product page.
Practical tips
- Activate and test your eSIM before the flight, on Wi-Fi.
- Keep the QR code: some operators let you reinstall the profile on the same device.
- The British network is very reliable in urban areas; in rural Scotland or some Welsh valleys, coverage depends on your eSIM's partner network.
- Need to call UK numbers? Most plans are data-only, but WhatsApp, FaceTime or a VoIP service cover nearly every case.
In short, activating an eSIM in the UK is fast, cheap and free of billing surprises. Compare the deals, scan your QR code before you go, and you'll be connected the moment you arrive.