Prepay is a widget that displays USSD code information, such as your mobile balance, remaining data bandwidth, SMS etc. The screen shot on the left will give you a clear idea.
There are two versions of Prepay: Lite and Paid. The only difference between the two is the auto-update feature in paid version which is handy. I don’t like always tapping on the widget to update it and so I decided to better buy it.
This app works best with rooted phones as it can send USSD requests silently and update the values, which is not possible in un-rooted phones. It can also parse SMS replies from the operator along with simple USSD codes replies.
The app is still in development so you might encounter some problems. I haven’t came across any yet but if you do, do contact the author. This way you can help make this app better.
(Settings > Write to Dev)
P.S.: Don’t laugh at me for having no balance in my account, I only use this SIM for using the internet 😉