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Problem with setting up mobile data on Apple watch

Hi, i'm a new customer to O2 on a sim only plan. I want to set up mobile data on my Apple watch (had my previous network set up on it and have deleted the old plan) but am coming across the problem of not being able to log into my O2 account when pro...

Resolved! Unable to Make calls/or access voicemail

Unable to call out on my mobile or even access the voicemail service since Monday morningI put in an O2 service network report on Monday and no faults were reported in the areaMy Account is up up-to-dateRestarted my mobileSystem Software is up-to-dat...

Resolved! Poor mobile signal indoors - what can I do?

O2 says good quality signal should exist in my area both outside and indoors. I have very weak or non-existent signal in parts of my house. Any recommendations for how to address this problem? O2 does not appear to allow wifi calling on my device.

Resolved! New Phone (upgrade) and transfer to new sim

Hi, I’ve got my new phone today. Transferred all of my details from my old phone which was on O2. Put the new sim in my new phone (with the same number) but it’s not connect to the network. I’ve turned it on and off all day but still nothing ?

Resolved! Blacklisted iPhone 11

Hi, I bought an iPhone which about a year ago which has been working fine on another network. I've just switched over to o2 and the SIM card does not work. Upon doing an IMEI check the phone has been blacklisted by o2 - can this be undone?

Resolved! Swap sim

Hi there iv swapped my sim over from Vodafone to o2 I put my new o2 sim in when my Vodafone sim when to no service iv turned my phone on and of several time and my o2 sim is just saying no service aswell as my Vodafone one I don’t know what to do as ...

Resolved! Calling/Sending message to a Ukrianian mobile from UK mobile

My girlfiend sent me her mobile phone number so we can text and call each other. She is located in Ukraine and the number she sent was +380 93 xxx xx xx. I tried calling and sending message but both failed. Am I doing something wrong?

Error 0

Can't send any messages to any competition numbers. Driving me mad...help please!

Resolved! iPhone 8plus (iOS 15) No option to enable wifi calling

No option on my O2 app or in my setting to enable wifi calling. Please help.

Samsung Galaxy A52s wi-fi calling

I'm considering getting a Galaxy A52s 5G. It's important to me to be able to make calls over wi-fi. This phone doesn't appear on O2's list of phones that allow calls over wi-fi, which seems odd because (a) the A52 without the 's' is on the list and (...

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