Topping up online is as simple ever.
You'll no longer be given a voucher number that you need to call in to activate. Simply login using your mobile number and password (don't worry, if you don't already have a password you can easily get a new one sent to your mobile) and click the top up button. Once you confirm your top up the value will automatically be added to your balance.
If you connect over mobile data on your laptop or device then you won’t even need to login, you'll be logged in automatically.
If you're unable to login to top up online, then you will still be able to top up by any of the other methods below.