Understand your bill
Get a clear understanding of how your online or paper bill works with our helpful guide.
Pay Monthly
O2 Pay Monthly customers may receive either online or paper bills.
To see an explanation of the details on your bill type choose one of the options below:
Pay As You Go
To check your balance, use hotkey 2 or key *#10# then press the call button and your calltime balance will be shown on your display. Alternatively dial 4444 FREE from your mobile phone to hear your balance.