3G everyone else 5G

[DanielleHarvey]

I’ve just landed in Iceland and only have 3G but everyone in my party has 5G and we’re all on O2

i have restarted my phone numerous times and reset network settings.

[MI5]

@DanielleHarvey 

Some things to try:
Check data roaming is on in phone settings.
Manually search for another network
Turn off 5g
Change your data APN to "mobile.o2.co.uk"
Check with O2 whether you have a roaming bar on your account. Do this via social media
If you message O2 on Facebook ( https://o2uk.co/O2CFB) , Twitter ( https://o2uk.co/O2CTW) or Instagram ( https://o2uk.co/O2CIG) , they should be able to help.

[pgn]

Is your phone an older model, or perhaps has no 5G capability? Or it may have been stepped down to 3G only in SIM settings, @DanielleHarvey - or may be PAYG, only Pay Monthly on O2 get 5G. You have rebooted your phone since landing in Iceland, so it could be APN is incorrect, as highlighted above.