O2

I've been living abroad for a few months now and I have kept my O2 SIM so that people can still contact me on my UK number. Someone wants to call me from the UK but my partner says I may be charged. Is this true? As I've had my phone on every day, I'...

Hi there,Is it currently possible to switch from a pay monthly contract to PAYG by going in store?Thanks

I've been an O2 customer for over 15 years but have now moved to Germany. I have a new number and tariff for usage here. I expect to only be abroad for two years and would like to return to using O2 when I inevitably return to living in the UK. I wou...