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Trouble using 4 G away from home, needing to speak to someone, can’t find a tel no

As above in a nutshell

Resolved! I have a note 20 ultra, but none of my incoming calls have caller Id

When I upgraded my phone, my line was accidentally turned of by O2, since it's been switched back on I no longer have caller ID on incoming calls

Resolved! Cannot redeem extra

I have selected an extra to redeem and the ‘continue’ button does not redirect me to the Disney+ site as stated.

Resolved! No signal

Updated my tariff and now I have no signal. May be the SIM??

Verification codes

O2 says it can’t send me any more verification codes. Why

I've had no signal at all for over a week

My phone has not had signal for over a week, I can't go out because I won't be able to contact anyone & no one can tell me why. I've had countless new sims & e-sims & the issue is not resolved. I've had Apple run all the tests on my phone & it is not...