eSIM to United Kingdom: which plan to choose in 2026?

The best eSIM for United Kingdom, compared for you: price, data, coverage and activation.

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See the plans Updated in août 2026 • 28 plans available

Compare eSIM plans for United Kingdom: data, duration, prices and operators. Find the best offer and activate it now.

What are the best eSIM plans to United Kingdom?

Each provider's best plan for this country, with the real price.

Provider	Data	Duration	Price	Price/GB
Saily ★ 4.7 · Review	Unlimited	7 days	$9.03	—	View →
Ubigi ★ 4.4 · Review	20 GB	30 days	$45.13	$2.26	View →
Holafly ★ 4.6 · Review	Unlimited	5 days	$19.05	—	View →
YesSim ★ 4.3 · Review	Unlimited	7 days	$10.03	—	View →
DrimSim ★ 4.1 · Review	5 GB	30 days	$15.70	$3.14	View →

Cheap eSIMs to United Kingdom

A comparison of the cheapest plans, all providers combined.

Provider	Data	Duration	Price	Price/GB
Saily	1 GB	7 days	$4.01	$4.01
DrimSim	1 GB	7 days	$4.98	$4.98
Ubigi	500 MB	30 days	$5.01	$10.03
Ubigi	1 GB	30 days	$7.02	$7.02
Saily	Unlimited	7 days	$9.03	—
Saily	3 GB	15 days	$9.03	$3.01

Guide expert

Finding the best UK eSIM plan is not just about choosing the largest amount of data. The network used, actual validity period, tethering, calls, roaming to Ireland or Europe: these details can completely change your experience. This guide helps you buy, install and use your eSIM without unpleasant surprises, from London to the Highlands.

How does an eSIM work in the UK, and is my phone compatible?

An eSIM is a digital SIM card built into your smartphone. It downloads a carrier profile instead of requiring a small plastic card. For a trip to the UK, you buy a plan online, usually receive a QR code or activation code, and then add the profile in your phone settings. Your device then connects to a partner British network as soon as it detects local coverage.

The main difference from a physical SIM is convenience: no need to find a shop at Heathrow, Gatwick, Manchester or Edinburgh, no SIM tray to open and no risk of losing your French card. You can install the eSIM before departure, as long as you have Wi-Fi. Installation does not necessarily mean that the plan starts immediately: depending on the provider, validity begins at installation, activation or the first connection to a network in the UK. Check this before scanning the QR code.

On most recent phones, the eSIM works with Dual SIM alongside your usual line. You can keep your French SIM active to receive banking SMS messages or calls, while using the travel eSIM for mobile data. This is the safest setup: your number stays the same, but you avoid data roaming charges from your French provider. A travel eSIM is usually a temporary, prepaid profile intended mainly for Internet access.

iPhone: iPhone XR, XS and later models generally support eSIM; some models sold in specific markets may have particular limitations. Check under Settings > Cellular > Add eSIM.
Samsung: many Galaxy S, Z Fold, Z Flip and some recent Galaxy A models are compatible. Open Settings > Connections > SIM manager to look for the add option.
Google Pixel: Pixel 3 and later models broadly support eSIM, with some possible restrictions depending on the country of purchase or the original carrier.
Other brands: some compatible Oppo, Xiaomi, Motorola, Huawei and Sony models offer eSIM, but not all variants do. Be sure to check your exact device model.
Unlocked phone: your phone must be unlocked for use with any carrier. A device still tied to a carrier may reject a foreign eSIM profile, even if it is technically compatible.
Quick check: dial *#06# and look for an EID number, or check your network settings. The presence of an EID generally confirms eSIM capability, but does not guarantee that the phone is carrier-unlocked.

Which eSIM offers the best 4G and 5G coverage in the UK?

The best eSIM for the UK is the one that uses a network suited to your itinerary, not necessarily the one advertising the most gigabytes. The main local networks are EE, Vodafone, Three and O2. Depending on the eSIM provider, your plan may use one of these networks or switch between several partners. This is worth checking before you buy, especially if you are leaving the cities.

EE is often considered a very strong choice for nationwide coverage, particularly on major routes and in many rural areas. Vodafone has broad, reliable coverage in cities and across a significant part of the country. O2 is widely present in urban areas and on public transport, while Three can offer an excellent data experience in well-covered areas, with more variable availability outside densely populated zones. No network is perfect everywhere: terrain, local weather, thick walls and network congestion also matter.

In London, Birmingham, Manchester, Liverpool, Bristol, Cardiff, Glasgow and Edinburgh, you will generally find fast 4G and often 5G. For checking Google Maps, booking a train, using WhatsApp or paying with an app, 4G is more than sufficient. 5G provides extra comfort for videos, file transfers or tethering, but it is not worth paying more for if your trip is fairly typical.

Problems are more likely to occur in the Scottish Highlands, the Hebrides, some valleys in the Lake District, Snowdonia/Eryri, rural Yorkshire, Dartmoor and parts of Wales and Cornwall. In these areas, a weak 4G signal or a switch to 3G can occur regardless of your eSIM. Download offline maps and tickets before leaving a major city: this is much more useful than relying on a promise of 5G everywhere.

Major cities and airportsIn London, Manchester, Edinburgh, Glasgow, Cardiff and most airports, 4G is generally smooth and 5G is often available.

Road routes, stations and tourist attractionsCoverage is usually good on major routes, in medium-sized towns and near popular attractions, with occasional interruptions on trains.

Countryside, national parks and hilly areasIn the Highlands, some Welsh valleys, moorlands or islands, the signal may be weak, intermittent or unavailable depending on the network.

Underground transport and thick-walled buildingsThe network can vary on the London Underground, in railway tunnels, basements, older hotels and buildings with very thick walls.

Before buying, look for the eSIM’s specific partner network, rather than a simple “UK coverage” claim.
For a road trip in Scotland, Wales or Cornwall, prioritize a plan using a network known for its geographical coverage rather than one that is simply cheap.
Do not confuse “5G available” with guaranteed 5G: your device, location and network load determine the technology you actually receive.
Keep Google Maps, Citymapper or Organic Maps in offline mode for hiking days or long car journeys.
If your phone shows a signal but nothing loads, first check the eSIM’s data and roaming settings before blaming the coverage.

Should you choose a UK eSIM or a regional Europe plan?

A strictly UK eSIM is often the most suitable choice if you are staying in England, Scotland, Wales and Northern Ireland. It may offer more data for your budget than a regional plan. However, keep in mind that the UK is no longer part of the European Union, and roaming included in your French plan is not automatic, even though some French carriers still offer it.

A Europe or multi-country plan makes more sense if your trip combines London and Paris by Eurostar, Edinburgh and Dublin, or an itinerary including Belgium, the Netherlands, Iceland or other stops. It avoids installing several profiles and limits the adjustments required when crossing borders. However, it may cost more per gigabyte or use a different partner network from that of a national eSIM.

Ireland deserves particular attention: the Republic of Ireland and Northern Ireland are not the same destination from the perspective of many plans. Belfast is in the UK; Dublin is in the Republic of Ireland. If you are driving across the island, check the countries covered and roaming conditions precisely rather than relying on the plan’s commercial name.

Choose a national eSIM for a trip exclusively within the UK and a good data-volume-to-price ratio.
Choose a regional plan if you are visiting the UK, France, Belgium or the Republic of Ireland in succession.
For a Eurostar return trip, check that France is included: the UK eSIM may stop working as soon as you arrive in Lille or Paris.
Read the list of covered territories: Jersey, Guernsey, the Isle of Man and Gibraltar are not systematically included in “UK”.

What do traveler reviews reveal about eSIMs in the UK?

Travelers particularly appreciate connectivity as soon as they land, not needing a physical card and being able to keep their French number. For a weekend in London or an urban stay, a properly configured eSIM makes those first moments much easier: ordering an Uber, checking the route to the hotel, contacting loved ones and paying online are all possible without relying on public Wi-Fi.

Less enthusiastic reviews often concern activation started too early, a profile that was installed but not selected as the data line, or a forgotten data roaming option. Many travelers assume that an eSIM corresponds to a single network, when it actually depends on a local partner carrier. Quality can therefore change significantly between central London and an isolated road in the Highlands.

Support also makes a difference when a phone rejects the QR code, an APN needs to be added or a top-up is required. Before choosing, prioritize a provider that clearly states the network used, hotspot policy, top-up procedure, validity start date and a way to contact support. A vague offer is rarely a good deal.

Recurring advantages: instant purchase, delivery by email, keeping your personal number and having data without visiting a shop.
Installation warning: an eSIM added to your phone is not always automatically selected for mobile data.
Unlimited-plan warning: some plans impose a daily limit, reduce speeds or prohibit tethering.
Support warning: keep your order number, QR code and activation details until the end of your trip.

How do you buy, install and activate your eSIM for the UK?

Installation usually takes just a few minutes if you prepare your phone over Wi-Fi before departure. Never delete the eSIM profile while your plan is still useful: the QR code can often be used only once.

1
Check compatibility
Confirm that your phone has eSIM functionality and is unlocked. Also update your operating system before traveling: a recent version of iOS or Android reduces configuration errors and makes Dual SIM management easier.
2
Buy and receive the QR code before departure
Buy your plan when you have a stable connection, ideally 24 to 72 hours before departure. Keep the confirmation email, take a screenshot of the QR code and note the SM-DP+ address and manual activation code: they can save you if the code cannot be read or you change screens.
3
Install the profile on iPhone and Android
On iPhone, go to Settings > Cellular > Add eSIM, then choose “Use QR Code”. On Android, the path varies slightly: Settings > Connections > SIM manager > Add eSIM on Samsung, or Settings > Network & Internet > SIMs > Add SIM on many Pixel devices. Scan the QR code from another screen or enter the details manually if necessary.
4
Activate on arrival and configure the APN
When you arrive in the UK, activate the new line, set it as your mobile data line and enable “Data Roaming” only on this eSIM if the provider requires it. Do not enable it on your French line. The APN is often installed automatically; if Internet access does not start, enter the APN provided in the setup message exactly as shown.
5
Troubleshoot if Internet access does not start
First deactivate and reactivate the eSIM line, turn on airplane mode for thirty seconds, then restart the phone. Check that data is assigned to the eSIM, that roaming is allowed on it and that the APN contains no errors. If the problem continues, send support a screenshot of your network settings and the error message, without publicly sharing your QR code.

How can you keep your number, make calls and share your connection in the UK?

You can generally keep your French number while using a travel eSIM for Internet access with Dual SIM. In your settings, leave your usual card active for calls and SMS, but select the UK eSIM for mobile data. Disable cellular data and roaming on your French line to prevent it from automatically taking over when the eSIM signal weakens.

Most travel eSIMs are data-only plans: they do not include a British +44 number, SMS or standard calling minutes. This does not prevent you from communicating. WhatsApp keeps your existing number, and FaceTime Audio, Signal, Telegram, Messenger, Skype or Wi-Fi calls work as soon as you have data. To contact a hotel, restaurant or taxi that does not use messaging apps, check before buying whether a local number and calls are genuinely necessary.

Tethering is very useful for working from a train, connecting a tablet or helping a computer get online. However, it is not guaranteed: some plans allow it without restrictions, others block it, and some supposedly unlimited plans reduce speeds or impose a specific allowance. A computer can consume several gigabytes in a few hours through video calls, updates or cloud synchronization, so disable automatic downloads.

When you approach your limit, top up through the provider’s app or customer account before you go completely offline. If a top-up is not possible, connect to the Wi-Fi at your hotel, a café or a station to buy a new plan. Do not rely on receiving a reminder SMS: data-only eSIMs do not always receive message alerts, and the phone’s counter is not always synchronized with the actual balance.

Assign mobile data to the UK eSIM and disable “Cellular Data Switching” if your phone offers this option.
Keep your French SIM active for bank verification codes, but turn off its data roaming before departure.
WhatsApp works with your usual number: do not create a new account or change your number when you arrive.
Explicitly check that hotspot is allowed if you need to work on a computer or connect several devices.
Monitor your usage in the provider’s account area and in your phone settings, with an alert set slightly before your limit.

What guidelines should you follow to choose the best UK eSIM plan?

For light use, allow around 1 to 3 GB per week; for an active trip involving maps, social media and bookings, plan for around 5 to 10 GB. Beyond that, your needs mainly depend on video, tethering and the length of your stay.

Calculate according to your usage, not duration alone: Google Maps, emails and messaging use little data, while TikTok, Instagram, YouTube, video calls and photo backups can consume several gigabytes very quickly.
Compare the price per gigabyte and validity: a 10 GB plan valid for seven days is not necessarily better value than a 5 GB plan valid for thirty days. Also check whether days are counted in 24-hour periods or calendar days.
Read the unlimited-plan terms: “unlimited” may mean a high-speed allowance followed by reduced speeds, a daily limit, a fair-use policy or a hotspot restriction.
Choose a network that matches your route: for London only, most offers will work well; for the Highlands, the Lake District, rural Wales or Cornwall, the quality of the local partner becomes decisive.
Install before departure, activate carefully: install the profile over your home Wi-Fi, but do not activate it too early if validity starts at activation or the first connection. The provider’s terms always take precedence.
Download essentials for offline use: maps, train tickets, hotel bookings, guides and translations keep you from depending on the network in a tunnel, a crowded station or a rural area.
Avoid hidden data usage: disable app updates, iCloud or Google Photos backups over mobile data, autoplay videos and podcast downloads.
Plan for professional needs: a day of video calls, file transfers or tethering may justify a more generous plan than a two-week sightseeing trip.
Keep a backup option: retain hotel Wi-Fi access, a bank card compatible with mobile payments and the support contact details. An eSIM is very convenient, but it does not replace basic preparation.

Questions fréquentes

Will my eSIM work as soon as I arrive at Heathrow, Gatwick or Manchester?

Yes, if it is correctly installed and activated, your eSIM can connect as soon as your phone picks up the local network at the airport. Before your flight, check that the line is present, then activate mobile data on the eSIM after landing.

When does my eSIM plan’s validity begin?

It depends on the provider: it may begin at installation, activation or the first connection to the British network. Read this condition before scanning the QR code, especially if you buy several days before departure.

Can I use one eSIM on two phones or a tablet?

No, an eSIM profile is normally linked to a single device, and its QR code is often for one-time use. To connect a tablet or computer, use the hotspot if your plan allows it, or buy a separate eSIM.

Can I call British emergency numbers with a data-only eSIM?

For emergencies in the UK, dial 999 or 112. Availability depends on your device, the accessible network and the circumstances; never consider a data-only eSIM a guaranteed substitute for an emergency service. Also keep your accommodation address saved offline.

Can I get a refund if the eSIM does not work?

Policies vary considerably, and an eSIM that has already been installed or used is often difficult to refund. Contact support before deleting the profile, keep screenshots, your order number and the tests you performed: this makes it easier for your request to be reviewed.