Who has the fastest, who has the widest, and how to check signal at your postcode.
Ask Our Team →All four major UK MNOs claim approximately 99% outdoor population 4G coverage. Practical differences appear in rural areas, inside buildings, and on transport links.
| Network | 5G Population | 5G Speed Rank | Key Advantage |
|---|---|---|---|
| EE | 87%+ (widest) | 2nd | Widest 5G, 5G+ Standalone |
| O2 | ~70% | 3rd | 5G Standalone, satellite rural |
| Three | ~62% | 1st (fastest) | Most spectrum, fastest speeds |
| Sky Mobile | ~70% (via O2) | — | Same as O2 direct |
Source: Opensignal UK Mobile Network Experience Report, January 2026
Three has the fastest 5G (140MHz spectrum, ~187Mbps median) but narrower geographic reach (~62% population). EE has the widest 5G but slightly lower peak speeds. O2 sits between the two. For city users Three's speed advantage is real. For rural users EE or O2 are more reliable.
All three networks support Wi-Fi Calling — routes calls over broadband when mobile signal is weak indoors. Enable in iPhone Settings or Android Settings. Useful in older buildings where 4G penetration is poor.
Our independent team can help you compare O2, Three and Sky Mobile in a 2-minute call — free, no sales pressure.