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Can 4G calling be used on devices that were not bought from 02?

I have replaced a Samsung Tab Active 2 (which O2 told me was not capable of making 4G calls) with a Tab Active 3 (Which the O2 IMEI check said was compatible.)However, it now appears that not only can I still not make 4G calls (the option does not sh...

Resolved! NC8M9******* Code

I don't know what this number is for. It expires 2.07.2025.

Resolved! Retrieving an old 02 number

Quite a few years ago, my o2 account/phone number was paused due to an unpaid bill which I eventually settled. I know this might be a long shot but I was wondering if it's possible to get back the same number I used to have. I cannot remember my, the...

Mobile number suddenly showing as unrecognised when contacts try to leave me a voice message

From yesterday when one of my contacts calls me and tries to leave me a voice message they get a message saying that my number is not recognised. The calls come through OK if I pick up - this is only happening when people are trying to leave me a mes...

Resolved! S25 Ultra

Hi, I have an s9+ and I want to get a sim for 25 ultra, my s9+ sim doesnt have 5G and the sim doesnt work in s25 ultra, I have tried to contact O2 and they have said I cant have a sim for the S25 ultra, reason, I didnt get it from them, evcen though ...

Resolved! Removing my account

Hello guys, after how many months of non-paying the bill O2 company will withdraw the number from me?I did not pay the monthly bill from two months and I don’t want to loss my number.

Resolved! Messages received that I don't understand.

I've just received an email and text telling me "We're just letting you know your NC4S301527 will expire on 02/07/2025." I have absolutely no idea what it means.Please advise.

Resolved! Inexplicable text message from O2

I have received a text message I do not understand, please explain:- " Just letting you know your ********* will expire on 02/07/25" [Mod edit: Please do not share personal details as your posts are visible to the public. Thanks!]

Atrocious coverage, phone is showing good 4G and/or 5G

Pretty much since I got my O2 sim, my 4 and 5G coverage has been quite unreliable. I have had a SIM replacement, and that did nothing. The most helpful thing was when someone at my local O2 store told me to toggle 5G off because that'll force you ont...

Can’t hear phonecalls

When I make or receive a call, I can’t hear the person but they can hear me. It’s a connection and not mic/speaker error as if I make a call through any other app ie WhatsApp there’s no error. If I put airplane mode on and off (almost to reboot) and ...

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