Does the Sonim XP3plus work on O2?
It works, with caveats.
Works with caveatsCalls and texts can fall back to 2G. O2 plans to start switching 2G off from 2029. We haven't found confirmation that 4G Calling works on O2. 4G data should work (shared bands: 1, 3, 40).
Expect it to work, but read the switch-off dates below. That's where the catch is.
We worked this out from the phone's published bands and O2's own published network facts (see How we check). Nobody has confirmed it for this exact pairing yet.
O2 (UK)
- 3G: Switched off (completed 2025/26)
- 2G: Staying on for now; O2 plans to begin switching 2G off from 2029
Sonim XP3plus
- 2G: GSM 850 / 900 / 1800 / 1900
- 3G: 850 MHz, 1700/2100 (AWS) MHz, 1900 MHz, 2100 MHz
- 4G bands: 1, 2, 3, 4, 5, 7, 12, 13, 14, 25, 26, 30, 39, 40, 41, 66, 71 (no band 20)
- 4G Calling: unknown – Built for US networks.
The same applies to networks that run on O2: giffgaff, Tesco Mobile, Sky Mobile. Smaller networks sometimes handle 4G Calling differently, so check with them too.
Other networks in the UK
- EE Works with caveats
- Vodafone UK Works with caveats
- Three Unknown
Everything about the Sonim XP3plus · All phones on O2 · Dumbphones that work in the UK
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Sources
How we decide: our method.