O2: Top up prepaid credit online

This guide shows you how to conveniently top up your O2 prepaid credit online.

Open the O2 Express Topup website.
Enter your phone number or your user name and your password here.
First you have to choose the payment method. Here you can choose between direct debit and credit card payment.
Then choose a one-time, weekly or monthly top-up.
Then select one of the specified top-up amounts or enter your desired amount.
With the button "top up", the amount will be credited to your account.