Best eSIM for United Kingdom
Updated November 2026
The short answer
The best eSIM for the UK is one that works the same in London, the Highlands and on the train in between. Ours connects to a national UK network, delivers instantly, and costs far less than roaming from outside Europe.
United Kingdom plans from Tonavira start at $1.99, with 598 plans to choose from. Every plan is a one-time payment with no subscription and no roaming bill afterwards.
Best for: City breaks and multi-stop trips taking in London, Edinburgh or the countryside.
When you should not buy from us
No eSIM suits every trip. These are the cases where something other than our United Kingdom plan is the better buy.
- You are travelling from the EU and your home plan already includes UK roaming. Check before buying anything.
- You need a UK number for a rental deposit or a delivery.
What to compare before you buy
The cheapest United Kingdom eSIM is rarely the best one. These are the things that decide whether a plan actually works for your trip.
- Price per gigabyte, not the headline price: a $5 plan with 1 GB costs more per gigabyte than a $13 plan with 5 GB.
- Whether hotspot and tethering are allowed. Many cheap plans block them, which matters the moment you open a laptop.
- What happens when the data runs out: can you top up the same eSIM, or must you buy and install a new one?
- What 'unlimited' means on that plan: almost always a daily allowance at full speed, then a much slower connection.
- Whether validity starts when you buy, when you install or when you first connect. Each of our plan pages says which.
- Whether there is a refund if the eSIM will not work on your phone, and whether a human answers when something goes wrong.
What actually matters in United Kingdom
- Coverage is good nationally but genuinely patchy in rural Wales, the Scottish Highlands and on many train lines.
- Most of the London Underground now has mobile signal, but not every line or tunnel.
- Contactless payment is everywhere, so you need less data than in cash-based destinations.
How much data do you need for United Kingdom?
200–400 MB a day is typical for a city trip. 3–5 GB covers a week comfortably.
Not sure? The data calculator works it out from how you actually use your phone.
Our United Kingdom plans
One-time payment. Each plan page says when its days start.
500 MB
EE [5G], 3 [4G]
$1.99
≈ $0.28 / day
1 GB
EE [5G], 3 [4G]
$2.99
≈ $0.43 / day
2 GB
EE [5G], 3 [4G]
$3.99
≈ $0.27 / day
3 GB
EE [5G], 3 [4G]
$4.99
≈ $0.33 / day
3 GB
EE [5G], 3 [4G]
$5.99
≈ $0.20 / day
5 GB
EE [5G], 3 [4G]
$6.99
≈ $0.23 / day
10 GB
EE [5G], 3 [4G]
$11.99
≈ $0.40 / day
20 GB
EE [5G], 3 [4G]
$19.99
≈ $0.67 / day
50 GB
EE [5G], 3 [4G]
$55.99
≈ $0.31 / day
Not sure how much you need? Use the data calculator
Questions about eSIMs in United Kingdom
What is the best eSIM for United Kingdom?
Pick a plan that covers your whole stay with some data to spare. We offer 83 United Kingdom plans starting from $1.99, delivered instantly by email and in your account.
Which networks does the United Kingdom eSIM use?
It connects to EE [5G], 3 [4G], and your phone switches to the strongest available network automatically.
Can I install my United Kingdom eSIM before I travel?
Yes, on the day you travel: install it on Wi-Fi before you leave. Some plans start counting when the eSIM is installed and others when it first connects in United Kingdom, so installing on the day keeps all your days.
Do I get a phone number with the United Kingdom eSIM?
No, it's data only. Call and message over WhatsApp, FaceTime or Telegram, and keep your regular SIM switched on to receive texts such as bank codes.
How much data do I need for a trip to United Kingdom?
Most travellers use 0.5–1 GB per day for maps, messaging and social media. Streaming video uses much more. Our data calculator gives a personal estimate.
Updated November 2026. Our prices are read from our live catalogue, so the figures above are what we charge today. Full United Kingdom plan details are on the United Kingdom destination page.