O2

I have an old account online in which I need to prove my mobile number belongs to me.The instructuons are: "Go to Settings > About device > Status. The phone number will be listed under ICCID."But my ICCID/Phone number is "Unknown".How can I get my p...

I have just received my new O2 SIM in the post and, as advertised on the leaflet my sim came in, I topped up with £10 and text FREE10 to 21500 to receive my extra £10 credit. But I receive the reply "It looks like this offer isn't for you." Can anyon...