O2 in United Kingdom: Coverage & Tips for Travellers
eSIM from 1,00 USD · 100 MB. Networks: 3 (5G), O2 (5G), Vodafone (5G).
O2 in United Kingdom
Best for: London and commuter belt
What to know
- Extensive London Underground coverage
- Solid in South East; weaker in very rural Scotland
Areas where signal can drop
- Scottish Highlands and islands (Skye, Outer Hebrides)
- Welsh mountains and Snowdonia
- Remote Cornish coastline and Dartmoor
- Deep countryside and some rail tunnels
Other carriers in United Kingdom
- EE: Best 4G/5G coverage in the UK
- Vodafone: Urban data and international roaming
If you have no signal (quick troubleshooting)
- Aeroplane mode for 10 s → disable.
- Confirm the eSIM line is set as "Mobile Data".
- Restart your phone.
- Settings → Network → Manual network selection → choose O2.
- If nothing works: check the APN (sometimes needs manual configuration).