Fastest 5G in London. Uses the EE network (UK's best coverage) for seamless data from Heathrow to Shoreditch.
The best eSIM for London is one that works instantly, avoids roaming fees, and doesn’t require local SIM registration. Ovosim connects you immediately on arrival with reliable 5G coverage.
London eSIM Configuration
Instant delivery
⭐ 4.8/5 · 1,200+ verified travelers.
3GB/Day
5GB/Day
2GB/Day
Why smart travelers switch to Ovosim for London.
| Feature | OVOSIM | Airalo | Your Carrier Roaming |
|---|---|---|---|
| Cost (Standard Plan) | From €3.49 | €8.99 | $10/day+ |
| Network Speed | 5G / 4G+ Priority | Throttled | Varies |
| Setup | Instant QR | Manual | Automatic |
| Works with foreign cards | Yes | Limited | No |
| Available at airport | Before arrival | Sometimes | No |
Last updated:
No surprises at the airport. Activate instantly on arrival.
Chat with actual humans if something goes wrong.
No hidden fees. No roaming charges. Period.
Ready in 3 simple steps.
Go to Settings > Cellular > Add eSIM and scan the QR code from our website
Name it 'Travel Data'. Set it to 'Secondary' so your main number still works.
When you land, turn on 'Data Roaming' for the eSIM line only.
Vending machines at Heathrow sell SIM cards for £30+. Ovosim plans start at £4.50. Plus, you keep your home number active for 2FA bank texts and WhatsApp while using Ovosim data for maps and browsing — both SIMs run simultaneously on your phone.
Transport for London (TfL) has rolled out 4G/5G across the Jubilee, Northern, Central, Elizabeth, and Victoria lines. Ovosim connects to EE — the UK's largest network — giving you the best chance of signal between stations. The Elizabeth line (Crossrail) has the most consistent underground coverage end-to-end, including the central tunnel section from Paddington to Abbey Wood. Download the TfL Go app before landing for real-time Tube status and journey planning.
Heathrow (LHR) WiFi is slow and requires registration — activate your Ovosim before landing to book your Heathrow Express or Elizabeth line ticket immediately on arrival. EE 5G covers all five Heathrow terminals. Gatwick (LGW) has EE 5G in both the North and South terminals. Stansted (STN) and Luton (LTN) have strong EE 4G/5G throughout — both used heavily by budget carriers like Ryanair and easyJet. Activate before landing at any of these airports and be connected before you reach baggage claim.
Central London — City of London, Westminster, Covent Garden, Soho, and Mayfair all have excellent EE 5G. East London — Shoreditch, Hackney, Canary Wharf, and Stratford (Olympic Park) have strong 5G coverage. South London — Brixton, Peckham, Greenwich, and Southbank all covered well by EE. West London — Notting Hill, Chelsea, Kensington, and Hammersmith have excellent indoor and outdoor coverage. The O2 Arena in Greenwich has strong EE signal throughout — useful for concerts and events.
Since Brexit, the UK is no longer part of the EU roaming zone. Many European SIM cards that offered free EU roaming now charge extra for UK usage — sometimes €2–5 per day on top of your existing plan. Ovosim's UK plan gives you local EE rates with no Brexit roaming surcharge and no hidden fees. If you're traveling between the UK and Europe on the same trip, use a separate Ovosim plan for each — UK and EU plans are priced independently with no cross-border charges.
EE covers the entire UK nationwide with no extra fees for leaving London. Oxford (55 min from Paddington), Cambridge (50 min from King's Cross), and Brighton (55 min from Victoria) all have excellent EE 4G/5G throughout city centers. Bath and the Cotswolds have solid coverage in towns with some rural gaps on country roads — download offline Google Maps for any Cotswolds driving route. Stonehenge has EE 4G at the visitor center. The Lake District and Scottish Highlands have coverage in towns but significant rural dead zones — download offline maps before any remote hiking.
Download before landing: TfL Go for Tube, bus, and Elizabeth line navigation with real-time disruption alerts. Citymapper as an alternative with excellent London coverage. Uber and Bolt for taxis — both operate widely in London. Monzo or Revolut if you need a UK bank account for payments — both offer instant setup. Google Maps with offline London map downloaded. Trainline for any National Rail journeys outside London. The NHS App if you need to access healthcare during your stay.
Scan the QR code and connect immediately.
Share data with your laptop.
Keep your original number for calls.
OVOSIM offers the best value eSIM for London starting at €3.49. It connects to EE for 5G speed.
Plans start from €3.49 for 1GB. There are no hidden fees or roaming charges.
Yes, the eSIM activates instantly upon arrival. You will have 5G data immediately.
Ovosim connects to EE — the UK's largest and fastest network with the best 5G coverage across London and nationwide. EE has the strongest underground coverage on the London Tube and the widest rural reach for day trips outside the city.
Yes — EE 4G/5G coverage is available on the Jubilee, Northern, Central, Victoria, and Elizabeth lines between stations and at platforms. The Elizabeth line has the most consistent end-to-end coverage. Signal drops in some deep tunnel sections on older lines.
Yes, significantly. Heathrow vending machines sell tourist SIMs for £30+. Ovosim starts from £4.50 with instant activation — no registration queue, no vending machine, no waiting.
Many European SIMs now charge roaming fees in the UK since Brexit removed the EU roaming protections. Ovosim's UK plan uses local EE rates with no Brexit surcharge — you pay the same whether you're in London or anywhere else in the UK.
Yes — EE 5G covers Heathrow (all 5 terminals), Gatwick (North and South terminals), Stansted, and Luton. Activate before landing at any London airport and be connected before reaching baggage claim.
Yes — EE covers the entire UK with no extra fees for leaving London. Oxford, Cambridge, Brighton, and Bath all have excellent EE coverage. Download offline Google Maps for Cotswolds or rural driving routes where signal can drop.
Yes — EE's dense urban network means strong indoor coverage at the British Museum, Tate Modern, Natural History Museum, O2 Arena, Wembley Stadium, and most major London venues.
For a 5–7 day London trip: 3GB covers basic navigation, messaging and social media. 5GB gives comfortable room for maps, the TfL Go app, and video calls. 10GB is ideal if you're doing multiple day trips or uploading content daily.
Yes — the same UK plan covers England, Scotland, Wales, and Northern Ireland with no extra fees. EE has strong coverage in Edinburgh, Glasgow, Cardiff, and Belfast. Rural Scottish Highlands and remote Welsh valleys have significant coverage gaps — download offline maps before any remote travel.
Yes on the UK side and in Paris stations. Signal drops in the Channel Tunnel itself — this is normal for all networks and all providers. Your eSIM reconnects automatically when you emerge in France.
Don't lose connection when crossing the border. One click to see plans for neighbors:
