O2

I have a CLASSIC Pay As You Go service which I use whenever I'm in the UK. However with COVID-19 it will be sometime before I get back to the UK from where I live in Australia. Can someone tell me how long I can keep my Balance for and how often do I...

I've just topped up my phone with 10 pounds but my balance is still showing zero. I tried making a test call to my O2 number from another phone service but I get a recorded message to say it wasn't possible to connect the call. I wish I knew how to r...