Fastest 5G
Three SIM-only — GBP 8/mo
60 GB on Three's network for the fastest 5G downloads in London at 193.8 Mbps. Best for streaming 4K or uploading large files on the go.
London Connectivity Report
Data-driven insights for optimal mobile performance across Greater London, the Underground, and major transport hubs.
Network Performance Matrix (London Metro)
| Provider | 5G Speed unfold_more |
Consistency unfold_more |
Availability unfold_more |
Reliability unfold_more |
|---|---|---|---|---|
Top Travel Pick Three |
193.8 Mbps emoji_events | 76.2% | 29.5% | 82.1% |
Best Value EE |
142.1 Mbps | 80.4% emoji_events | 32.1% emoji_events | 88.5% emoji_events |
| 85.4 Mbps | 71.8% | 22.4% | 79.3% | |
Unlimited Vodafone |
114.6 Mbps | 78.1% | 25.8% | 84.2% |
Source: Opensignal London Mobile Network Experience report, January 2026
Where do UK SIMs work on the London Underground?
TfL is rolling out 4G and 5G in the Tube. The Elizabeth line has full coverage; other lines are partially covered. EE, Three, Vodafone, and VMO2 are all supported. Wi-Fi exists at every station, even where tunnel signal does not.
check_circle
Full coverage
- · Elizabeth line — entire line, including tunnels
- · All 270 Tube stations have Wi-Fi at platform level
schedule
Partial coverage (rolling out)
- · Jubilee line — eastern half live
- · Central, Northern, Victoria — central sections live
- · Piccadilly, Bakerloo — partial
- · Circle, District — selected stations
Best London picks by use case
Premium consistency
EE 30 GB SIM-only — GBP 16/mo
EE leads consistency at 80.4% in London. Best for video calls and gaming where steady performance matters more than peak speed.
Most time on 5G
O2 100 GB — GBP 12/mo
O2 leads 5G availability at 77.8% in London. Best if you want 5G to "just be on" wherever you go.
Reliability
Vodafone 11 GB — GBP 7/mo
Vodafone leads reliability experience in London. Best if you depend on calls and SMS landing first time.
Value London daily driver
SMARTY 100 GB — GBP 10/mo
100 GB on Three's network at GBP 10/month with no annual price rise. Best balance of London 5G speed and price.
Expat / traveller
Revolut Mobile — GBP 12.50/mo
Unlimited UK plus 20 GB EU and US roaming on a Gigs / EE backbone. Best for London-based frequent flyers.
Should I check coverage at my postcode first?
Yes. London-wide metrics are an editorial guide, not a guarantee at a specific street. Before you sign up:
- Check Ofcom's Map Your Mobile for the postcode of your home and office.
- Check each provider's own coverage tool — they sometimes report better than Ofcom for very recent rollouts.
- Test on a free trial or rolling-monthly plan before committing to 12 or 24 months. SMARTY, iD Mobile, giffgaff, 1pMobile, Lebara, Talkmobile, and spusu all offer 1-month plans.
Frequently asked questions
Which UK network has the fastest 5G in London?
expand_more
Three leads 5G download speed in London at 193.8 Mbps in Opensignal's January 2026 report. EE leads consistent quality at 80.4%. O2 leads 5G availability at 77.8%. Vodafone leads reliability at 916 points.
Does my SIM work on the London Underground?
expand_more
Yes on supported lines. TfL has rolled out 4G and 5G across sections of the Circle, District, Central, Jubilee, Piccadilly, Bakerloo, Victoria and Northern lines, plus the entire Elizabeth line. EE, Three, Vodafone and VMO2 are all supported. Every Tube station has Wi-Fi at platform level.
Are SIM prices different in London vs the rest of the UK?
expand_more
No. UK SIM-only tariffs are national, so London users pay the same as Manchester, Cardiff, or Belfast. London differs only on network performance, 5G availability, Underground coverage, and shop access.