O2

Hi, I took out a monthly contract and paid for the phone outright up front plus a month airtime in advance. If I cancel the contract within the first 30 days will I still have to pay for a second bill? Thanks for any advice 

Hi, I have a pay monthly account with O2 and have just installed an O2 pay as you go sim in my old phone, mainly to keep in the car for emergencies. Is there any way I can register that one on my existing account? I hope somebody can advise, thanks!i...