Free eSIM for the UK 
3 GB of free mobile data across the UK and 38 other European countries. London to the Cairngorms, Cornwall to Belfast — your phone connects the second you clear Heathrow border control. No SIM-swap queue, no EE counter wait, no card charge.
Free for new users · Credit card for identity verification only — never charged · Valid 3 days
Why an eSIM beats a UK PAYG SIM
Post-Brexit the UK left the EU roaming zone — meaning visitors from Europe pay extra surcharges again, and UK travellers got hit first. The EE counter at Heathrow T5 typically queues 20+ minutes for a PAYG starter pack at £20 for 20 GB. Meanwhile a US carrier bills $10+ per day for transatlantic roaming. A 99esim installs in the Uber queue at Arrivals, keeps working on the Piccadilly line, and doesn't ask for a UK address or PAYG top-up card.
- No EE / Vodafone queue at Heathrow or Gatwick
- Works in England, Scotland, Wales and Northern Ireland on one profile
- Keeps your home number for bank 2FA and Apple Pay
- 3 GB is enough for a London long weekend or a Scottish road trip
How UK networks handle 99esim
99esim rides on EE's wholesale network — BT's mobile arm and the UK's largest by 5G footprint. You get full access to EE's 4G LTE which reaches 99% of the UK population, plus 5G in 150+ towns including all four capitals. Coverage along the West Coast Main Line and East Coast Main Line is strong — expect reliable signal at 200 km/h on Avanti Pendolinos and LNER Azumas.
Arriving at a UK airport
All UK airports have 5G at gates, baggage reclaim and ground transport platforms. Activate before take-off — EE latches on the moment your phone leaves airplane mode, handy because Heathrow wi-fi requires email sign-up and Gatwick caps at 90 minutes.
T5 has the strongest 5G. The Elizabeth line to Paddington/Tottenham Court Road is fully signal-covered now — no more tunnel dead zones between Hayes and Acton.
Gatwick Express to Victoria (30 min) has solid coverage. Both North and South terminals are well-covered; the inter-terminal shuttle stays online.
Ryanair's main UK hub. Stansted Express to Liverpool Street (50 min) keeps signal the entire route — no dropouts through rural Essex.
T3 is newest and has fastest 5G. Train to Manchester Piccadilly (12 min) is reliable. Tram Metrolink to the city centre also stays connected.
Tram from airport to York Place (35 min, through Haymarket and Princes Street) has full 4G/5G. Excellent coverage for first impressions of the capital.
Luton Airport Express to St Pancras keeps signal intact. The DART people-mover between terminal and train station is also covered.
Where your free eSIM works best
What 3 GB actually gets you in the UK
Brits on their phones are maps + Citymapper + contactless — the eSIM gets hammered in transit. Realistic breakdown of how 3 GB stretches:
UK-specific travel tips
Tube signal has quietly arrived
TfL finally fitted 4G to most central Tube lines through 2023-2024. Jubilee, Elizabeth, Central and Victoria are near-complete. Bakerloo and Piccadilly still have long tunnel gaps. Your eSIM uses the same EE-backed DAS everyone else does.
Scottish Highlands and rural black spots
EE's 'EE Elevate' rollout covers main A-roads but single-track roads in Assynt or Knoydart can drop signal for 20+ miles. Download offline OS maps if you're heading beyond the NC500 tourist trail.
Northern Ireland is still UK
Your eSIM works in Belfast, Derry, Bushmills — same as mainland UK. Cross the border into the Republic of Ireland and it switches to Irish networks (also covered by the 99esim's 39-country roster). No extra charge.
Channel Islands and Isle of Man are different
Jersey, Guernsey and the Isle of Man are Crown Dependencies, not the UK. Their networks aren't in the standard UK roaming zone — your 99esim may incur charges there. Check before ferry crossings.
Contactless and Apple Pay need data
TfL's pay-as-you-go and many UK transport systems use contactless bank cards. If your card requires 3D Secure SMS verification, you need your home-country SIM active for the code. Keep your home number online in the background.
Travelers who used 99esim in United Kingdom
"Landed at Heathrow, walked past the EE queue at T5, and was on WhatsApp before I hit the Piccadilly line. Best £0 I've spent."
"Did the NC500 in Scotland — signal was better than I expected. Only lost it briefly between Applecross and Lochcarron."
"Used it for a week in London with no issues. The Elizabeth line coverage in the tunnels was a nice surprise."
Frequently asked — UK edition
Does the free eSIM work on the London Underground?
Yes, on lines that TfL has fitted with distributed antenna systems — Elizabeth, Jubilee, Central, Victoria and most of the Northern line. Older lines (Bakerloo, Piccadilly beyond Earl's Court) still drop signal in tunnels. The Overground and DLR are covered throughout.
Can I use it in Scotland?
Yes — Scotland is part of the same UK eSIM profile. EE covers all major towns, the central belt and most A-road routes. The Highlands and Islands can thin out on single-track roads. Avoid relying on it alone for remote hiking.
Does it work in the Republic of Ireland if I cross from Belfast?
Yes. Crossing into the Republic triggers a switch to Irish networks (Vodafone Ireland or Three Ireland), which are also on the 99esim 39-country list. No roaming charge, no need to swap profiles.
Is 5G included in the free plan?
Yes — if your device supports 5G and you're in a covered area (all four UK capitals, most major towns, motorways near cities), the free plan uses 5G automatically at no extra cost.
Can I tether to my laptop?
Yes, tethering is enabled on the free plan. Keep an eye on usage — streaming, video calls and cloud sync burn the 3 GB quickly. A Zoom call over tether uses 500 MB per hour.
What if I run out of data?
Top up in the 99esim app in seconds — UK top-ups start at £2.49 for 1 GB. No auto-renew, no monthly subscription, no surprise charges after the trip ends.
Free eSIM in other European countries
Your 3 GB works in all 39 countries. Here are a few more popular destinations:
See all 39 countries →
Ready to claim your free 3 GB in United Kingdom?
Install the 99esim app, create a free account, and your data is live in about 90 seconds.