Avis Touchbalance is a simple yet very useful application for all smartphones from the 3rd edition, 5th edition and the latest Symbian^3 series.
Avis Touchbalance automatically queries your GSM mobile operator and displays the remaining credit balance of your account on your homescreen like a typical homescreen widget.
For obvious reasons it only works if your SIM card is registered as a prepaid subscriber.
It can automatically display your remaining prepaid balance after you make or receive a call, send or receive a SMS or MMS and after your disconnect from an active WAP/GPRS/3G internet connection. Not just that it can also show your prepaid balance after you send or receive an E-Mail. You can even configure the length of time the credit will be displayed for or can display it as a pop up screen.