Log in difficulties

[JH12]

I can't log in because the process requires a passcode sent to phone and my phone has stopped recognising my O2 Sim. I wanted to log in to upgrade and get a new Sim. How can I access my account online without a phone security code?

[Enlli]

Yep, only just introduced by O2. We warned them but they wouldn't listen.

Afraid you will have to contact O2

Guide: How to find help & contact O2 

[Oxonian]

If you visit your local O2 retail store @JH12, working replacement SIMs can be procured on the spot :-

Store locator | O2 UK | Find Your Nearest O2 Store

https://stores.o2.co.uk/

Please remember to take photographic identification (photo ID) with you ! 👍

Clearly, this will not be the answer if it is your physical handset rater than your SIM that has become defective.