United Kingdom eSIM providers at a glance

ProviderDataDurationPriceHotspot
Airalo Top pick1 – 20 GB7 – 30 days$4.50 – $24YesDetails →
Yesim Unlimited1 – Unlimited3 – 30 days$1.50 – $55YesDetails →
Saily1 – 20 GB7 – 30 days$3.49 – $22YesDetails →
DrimsimPay-as-you-goNo expiry~$3.50/GBYesDetails →

Starting prices captured for comparison — head to provider checkout to see the live rate and any active discounts.

Detailed provider reviews for United Kingdom

Airalo

Recommended

Airalo's UK plan ('Uki Mobile') runs on EE, which is by far the best network for anything outside London — the Scottish Highlands, Lake District, Welsh mountains, and Yorkshire Dales all have meaningfully better coverage on EE than on Vodafone UK or Three. For any UK trip that's not London-only, this is the right choice. Installation is painless, and the Eurolink regional plan includes the UK for mixed UK + Europe itineraries.

1 GB
$4.50 · 7 days
3 GB
$8.50 · 15 days
5 GB
$11.50 · 30 days
10 GB
$16.00 · 30 days
20 GB
$26.00 · 30 days
Pros
  • Runs on EE — best rural and Highland coverage in the UK
  • Reaches most of the North Coast 500 where other networks drop
  • Eurolink plan covers UK + 38 European countries for mixed trips
  • Pre-install before flying into Heathrow or Edinburgh
  • Hotspot enabled on every tier
Cons
  • Pricier than Saily — $1 more on the 1 GB starter
  • No unlimited plan for extended London stays
  • 3 GB / 15-day window tight for 2-week UK tours
  • Support is slow during UK bank holiday weekends
Visit Airalo →

Yesim

Best price

Yesim's $12 / 10 GB plan is strong value for UK trips of 1-2 weeks. SwitchLess network hopping provides meaningful benefit here because UK networks have genuine coverage differences in rural areas — Yesim will fall back to whichever is strongest. The unlimited plan is worth considering for anyone working remotely from London for 3+ weeks.

1 GB
$1.50 · 3 days
5 GB
$7.50 · 14 days
10 GB
$12.00 · 30 days
Unlimited
$27.60 · 7 days
Pros
  • SwitchLess genuinely helps in Scottish and Welsh rural areas
  • $12 / 10 GB / 30 days beats Airalo by $4
  • $1.50 / 3-day plan — cheapest London weekend option
  • Unlimited plan for month-long London stays
Cons
  • Can't force EE-only routing — fallback is automatic
  • iOS-only VPN feature
  • Unlimited soft caps around 70 GB
  • Smaller UK-specific support team
Visit Yesim →

Saily

Privacy-focused

Saily runs on Vodafone UK, which is fine for London and most major cities but noticeably weaker than EE in the Scottish Highlands, Lake District, and rural Wales. The ad blocker is legitimately useful here because UK news sites (The Guardian, BBC, Daily Mail) and the TfL app load with heavy advertising. Pick Saily for city-focused UK trips where the network difference doesn't matter.

1 GB
$3.49 · 7 days
3 GB
$7.99 · 30 days
5 GB
$11.99 · 30 days
20 GB
$22.99 · 30 days
Pros
  • Cheapest 1 GB starter at $3.49
  • Ad blocker saves data on UK news sites and TfL app
  • 30-day window on 3 GB fits most UK city trips
  • Nord Security brand trust for privacy users
Cons
  • Vodafone UK — weaker than EE in Scottish Highlands and Lake District
  • No regional plan covering UK + EU
  • Plan gap between 5 GB and 20 GB
  • Ad blocker sometimes breaks Barclays and HSBC mobile banking
Visit Saily →

Drimsim

Backup only

Drimsim is overpriced for a UK trip at $3.50/GB. Its relevant niche is mixed UK + EU + non-EU trips where no single regional plan works — for example a UK → Iceland → Norway itinerary. For any UK-focused trip, the other three are better value.

Pay-as-you-go
~$3.50/GB
No expiry
Balance never expires
Pros
  • One eSIM for UK + EU + non-EU European mix
  • Balance never expires
  • Works in 197 countries for global travellers
  • Good fallback if primary eSIM fails on arrival
Cons
  • Triple Saily's per-GB cost for UK usage
  • No volume discount — bad value above 2 GB
  • Not recommended as primary plan for UK
  • Clunky top-up interface
Visit Drimsim →

How much data do you need in United Kingdom?

The UK is a mixed-data destination. London has extensive free Wi-Fi — the Tube stations added continuous cellular coverage in 2024 (finally), Pret and Costa have fast free Wi-Fi, and most pubs now offer it. A London weekend uses remarkably little data. Edinburgh, Manchester, and other major cities are similar. The math changes fast the moment you leave cities.

The Scottish Highlands, the Lake District, and the Welsh valleys all have genuine coverage gaps and patchy café Wi-Fi. Driving from Inverness up the North Coast 500 route, you'll have stretches of 20-30 minutes without usable signal on any network. Wales between Snowdonia and the south coast has similar problems. If your trip involves any of these rural areas, plan for cellular-dependent navigation with offline map backups.

Our recommendation: 1-2 GB for a London city break. 3 GB for London + Edinburgh or London + Bath. 5 GB for a Scottish Highlands road trip or a 2-week multi-city UK tour. 10 GB if combining England, Scotland, and Wales.

Network coverage in United Kingdom

Post-Brexit, the UK is outside the EU roaming zone, which means your choice of eSIM matters more here than in most of Europe. The three UK networks are EE (BT Group, the market leader on 5G rollout and rural coverage), Three (Hutchison, strong in cities), and Vodafone UK. O2 is a fourth option but merged operations with Vodafone UK in 2024 under a shared infrastructure agreement.

EE has by far the widest 5G footprint and the best rural coverage — it reaches most of the Scottish Highlands, Lake District, and Welsh mountains where Three and Vodafone UK have gaps. For London alone the difference is minimal; for anything outside major cities, EE is the clear winner. Airalo runs on EE in the UK. Saily uses Vodafone UK. This is a meaningful difference if you're leaving London.

Tips for using an eSIM in United Kingdom

The UK is NOT in the EU roaming zone post-Brexit. A European regional eSIM may or may not include the UK depending on the provider — Airalo Eurolink includes the UK, but some regional plans don't. Always check specifically. If your European trip involves both the UK and Schengen countries, confirm UK inclusion before buying.

The London Tube now has full cellular coverage. TfL completed continuous 4G/5G across all Underground lines in mid-2024, so you can check Maps and respond to messages anywhere on the Tube — including the deeper lines like the Victoria and Jubilee. This is relatively new; older travel guides still say there's no signal.

Scottish Highlands need offline maps. Even on EE, the strongest UK network, the North Coast 500 and Isle of Skye have dead zones lasting 20+ minutes. Download the entire route offline before driving. Weather apps don't refresh in these areas, so check conditions at fuel stops.

UK plug adapters matter for data-heavy trips. UK outlets are Type G — if you're charging a phone and laptop while running a navigation-heavy day, you'll want adapters pre-bought. Airport kiosks charge £15+ for adapters.

Why eSIM is the best choice in the UK

UK local SIMs are excellent value on paper — Three's tourist SIM at £20 for 30 GB is the best deal of any European carrier — but they require passport registration at a physical shop (not at the airport kiosk, usually), and the activation sometimes takes 24 hours. For anything under a week, an eSIM activated before flying saves more time than the £5-10 price difference costs.

The other factor is the Brexit complication: if your trip includes both the UK and Schengen (say, London + Paris), you need either a UK-only plan and a Europe plan separately, or one regional plan that specifically includes the UK. Airalo Eurolink is the simplest answer for mixed UK + EU trips.

Frequently asked questions

EE is clearly the widest-coverage UK network — it's the only one with reliable signal across most of the Scottish Highlands, Lake District, Welsh mountains, and Yorkshire Dales. For London or other major cities the difference is minimal, but for anything rural, EE wins. Airalo runs on EE, which is the safer default for any UK trip leaving the cities.
Yes, as of mid-2024. TfL completed continuous 4G/5G across all Underground lines, including the deep-level Victoria, Jubilee, and Northern lines. You can check Maps, stream music, and respond to messages anywhere on the Tube. Older travel guides still say there's no signal — they're out of date.
It depends on the specific plan. The UK left the EU roaming zone in 2020, so not all European regional plans include it. Airalo's Eurolink regional plan does include the UK. Yesim Europe also includes the UK. Always check the country list explicitly before buying — some older regional plans exclude the UK.
Partially. You'll have UK cellular signal until the Channel Tunnel, then lose coverage for the tunnel crossing (about 20 minutes), then pick up French signal on the other side. If your eSIM is a UK-only plan, you'll have no signal in France. If it's a Europe regional plan that includes both countries, there's no extra charge but you'll still lose signal in the tunnel itself.
Yes. EE has the widest 5G footprint including central London, Edinburgh, Manchester, Birmingham, Glasgow, and most cities over 100,000 people. Vodafone UK and Three have 5G in the major cities only. All four eSIM providers connect to 5G automatically if your phone supports it.