EN
“I used the Europe Esim, went through different countries with it and it was working super fast 5G everywhere. Suprised for good!” 
United Kingdom eSIM
O2 UK 5GVodafone UK 5G
Free hotspotFree hotspot on every plan No throttling on fixed-data plans
How much data, for how long?
30 days
7 days
15 days
180 days
Validity does not start until your eSIM connects to a supported network at your destination. There is no deadline for first use. You can buy now and keep your plan for a future trip. Full refund on request, used or unused. We always refund the full amount you paid when you request it, whether your eSIM is unused, partly used or fully used. There is no time limit for requesting a refund.
- One-time payment
- Data-only: no phone number, voice calls or SMS. You pay once. There is no automatic renewal or extra charge when your data runs out.
- Top-up eligibility
- Top-ups are separate purchases. My eSIMs shows the options available for your eSIM. Availability can change; if no suitable top-up is offered, you may need to buy a new eSIM.
Going elsewhere too?
Add another country — each one is its own eSIM, all managed in one app.
Several countries, one eSIM
Each plan below includes United Kingdom. Compare their country lists to find the one that fits your route.
Total
€9.32
1 eSIM
United Kingdom eSIM at a glance
- Networks
- O2 UK 5G & Vodafone UK 5G
- Plans
- 13 plans, 100 MB to 50 GB, valid 7 to 180 days
- Hotspot
- Free hotspot on every plan
- Speed
- No throttling on fixed-data plans
- Calls and texts
- Data only. Call and text through apps such as WhatsApp, or keep your usual SIM on.
- Validity
- Does not start until the eSIM first connects to a supported network at your destination.
From the road
What travelers say about United Kingdom
52 customer reviews
EN
“The eSIM worked perfectly during my trip around Europe. It was very easy to install, connected as soon as I arrived, and the internet was fast and reliable everywhere I went. It made travelling much easier because I did not need to buy local SIM cards. Very convenient and worth the price. I would definitely use it again.” There is no deadline for first use. You can buy now and keep your plan for a future trip.
UK eSIM for rail trips, city breaks and rural detours
Compare UK eSIM plans for London transport, intercity rail and countryside stays. Check the included data, validity, territory and phone compatibility before choosing.
A UK trip may begin with a Heathrow rail choice, continue on a digital train ticket and finish on a Welsh coast or Highland road. Mobile data helps with live departures, platform changes and accommodation messages, but reception can vary inside stations and remote valleys. Keep key tickets and addresses offline; results depend on the plan, device, location and local network conditions.
Refund policy
We always refund the full amount you paid when you request it, whether your eSIM is unused, partly used or fully used. There is no time limit for requesting a refund.
No first-use deadline
Validity does not start until your eSIM connects to a supported network at your destination. There is no deadline for first use. You can buy now and keep your plan for a future trip.
Secure checkout
Cards, Apple Pay & Google Pay — encrypted by Paysera.
24/7 support in all languages
Instant replies guaranteed.
How eSIM works in United Kingdom
Install the eSIM on dependable Wi-Fi and save the QR code and instructions offline. After arrival, select it as the mobile-data line and follow the plan's activation guidance. Leave data roaming off on your home SIM unless you knowingly need it.
Buy a plan
Pick a destination, data allowance and validity period.
Install your eSIM
Scan the QR or auto-install in the app — no physical SIM.
Land & connect
Data activates on first connection at your destination.
Size it to your trip
Pick the profile closest to your trip. The estimate assumes normal use — maps, messaging, photos, a short call home.
As a rule of thumb, a 3–4 day city break runs on about 1–3 GB, a one-week trip on 3–5 GB, a two-week multi-country tour on 8–12 GB, and working on the road takes about 1 GB a day, so 15 GB or more for two weeks.
Recommended size
3GB3–4 days
≈0.4 GB a day
- Maps every day
- Messaging and photos
- A short call home most days
In total, a 20 GB data allowance covers roughly 6,700 shared photos, 333 hours of social media and browsing, 59 hours of video calls, 250 hours of music streaming, or about 4000 hours of maps and navigation. Messaging apps barely use data.
All United Kingdom eSIM plans
Important cities in United Kingdom
London · City guide
London
At Heathrow, the Elizabeth line serves the airport terminals and links into London. Use data to compare that route with the Underground, load the correct station exit and retrieve theatre or attraction tickets; keep the hotel address offline for tunnels or busy concourses.
London eSIM — set up before you flyManchester · City guide
Manchester
Manchester itineraries often move between Piccadilly, Victoria and tram stops near music or football venues. Keep the event ticket downloaded, then use data for a last-minute platform change or a walking route around road closures rather than relying on reception at the gate.
Manchester eSIM — set up before you flyEdinburgh · City guide
Edinburgh
In Edinburgh, data helps identify the airport tram stop, present a timed castle entry and check trains from Waverley. Old Town closures and festival crowds can alter walking routes, so save the accommodation address before threading through steep closes.
Edinburgh eSIM — set up before you flyLake District · City guide
Lake District
For a Lake District drive or hike, download the route, parking details and weather guidance while on Wi-Fi or in town. Valleys and fell paths can have limited reception, so mobile data should supplement—not replace—an offline map and an appropriate safety plan.
Lake District eSIM — set up before you flyWhy Horizon
Choose a UK eSIM around the route
Match the allowance and validity to travel days plus likely navigation and ticket use. Hotspot sharing is free on every Horizon plan. Do not assume a country plan covers Ireland, crown dependencies or an onward European stop.
Horizon eSIM Before you travel
Plan for
United Kingdom
Compare plan details
Check device compatibility
Install over Wi-Fi before departure
- Flexible choice
Better plans, built for real trips
Compare the listed data allowances and validity periods for your destination.
- Before departure
Easy to use
Install over reliable Wi-Fi before departure and follow the plan's activation instructions.
- Clear comparison
Compare the full plan
Review the current price, data, validity and coverage before checkout. Horizon fixed-data plans have no throttling.
- Reuse when eligible
Reuse an eligible eSIM
When the selected plan supports reuse or top-ups, My eSIMs shows the eligible options for the installed profile.
- Usage control
Stay connected
We'll alert you as you approach your limit. If the plan supports a top-up, My eSIMs shows the eligible options.
- Multi-country
Global & regional plans
Choose country, regional or global coverage and check every destination in the plan details.
Frequently asked questions
How much data should I choose for a UK trip?
Estimate maps, rail apps, messaging and media use, then choose an allowance and validity for the full stay. Streaming and laptop tethering can consume more data, so size the allowance for them.
Can I keep my home SIM active beside the UK eSIM?
A dual-SIM phone can keep both lines enabled, but set the UK eSIM for mobile data and disable data switching and roaming on the home SIM. Your home carrier may charge for calls, texts, voicemail or data on that line.
Does a UK eSIM include calls, texts or hotspot use?
Hotspot sharing is free on every Horizon plan. Horizon plans are data-only and do not include a local phone number, cellular calls or SMS. Calling and messaging apps use your data allowance. Enable Personal Hotspot on a compatible phone and keep Horizon selected for mobile data.
Will a UK plan cover all four nations and the islands?
Do not rely on the country label alone. Check the plan's territory list, especially for Northern Ireland and any islands. Actual service varies with the device, precise location and local network conditions.
Does the same eSIM work from the UK into Ireland or Europe?
Only when those destinations are explicitly listed. For a cross-border itinerary, compare regional plans with a UK-only option and verify every stop, including Ireland, before buying.
What should I do if the UK eSIM has no data?
Reconnect to Wi-Fi, confirm the eSIM is enabled and selected for data, then compare roaming and APN settings with the instructions. Restart the phone or reselect a listed network if directed. Do not delete the profile; contact support with order details and screenshots.
Do I need to turn on data roaming for the United Kingdom eSIM?
Yes. A travel eSIM connects to local networks as a roaming line, so turn on data roaming for the Horizon eSIM when you arrive. The plan is prepaid, so Horizon does not bill you after checkout. Keep data roaming off on your usual SIM to avoid charges from your home carrier.
What happens if I run out of data on the United Kingdom eSIM?
You can buy more. If your plan supports a top-up, My eSIMs shows the data you can add to the same eSIM. If it does not, buy another United Kingdom plan and install it the same way.
Will my phone work with the United Kingdom eSIM?
It will if your phone supports eSIM and is not locked to your home carrier. Many recent iPhone and Android models do, but some regional versions do not, so check your exact model on the supported devices page before you buy.
See supported devicesWill Horizon slow down my data?
No. Horizon fixed-data plans have no throttling. There is no daily limit that slows you down, so you can use your whole plan in one day if you need to. Your speed depends on the local network, your signal and how busy the network is. When your data allowance is used up, the plan stops rather than slowing down.
Can I get a refund if I already used some data?
Yes. We always refund the full amount you paid when you request it, whether your eSIM is unused, partly used or fully used. There is no time limit for requesting a refund.
Where next
Other destinations travellers pair with United Kingdom
Travel guides for United Kingdom
Guides
London at Christmas 2026: Winter Wonderland dates, markets and New Year's Eve
Hyde Park Winter Wonderland runs from 19 November 2026 to 3 January 2027, closed only on Christmas Day, with timed entry from £1. Plus the rink, market and lights dates announced so far, what runs on 25 and 26 December, New Year's Eve fireworks and the ETA or visa you need.
Guides
Five eSIM providers compared for the UK: data, calls and instant help
Compare UK eSIM prices from Horizon, Airalo, Nomad, Saily and Holafly. Check data-only versus calling plans and instant Horizon support.
Diaspora
Roots in the Balkans, life in the UK: cheap data both ways
London and the UK are home to a large Kosovar and Albanian community — here's how to keep calls home cheap and your phone working on every summer trip back.