I might be well behind the times saying this as have only just got Internet Banking in Thailand with Bangkok Bank but for anyone that doesnt know....

As well as paying all your normal bills etc.. you can also top your phone with the internet banking with the click of a button!

This has come in very handy as I dont have a 7 eleven that close and the shops that are nearby often run out of vouchers, sometimes online top up not working etc etc.. - also comes in handy when its p**sing down with rain and you run out of credit !!!