Understand your bill
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:
To view frequently asked questions about your bill click the link 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.
Find out more on checking the balance on your Pay As You Go mobile phone.