hello,
i have an idea for a application.
this one is designed to calculate the use of telephone in months.
however i am not a software writer. so i am just telling about the idea.
and I hope some one like the idea and make the saftware.

we can calculate the month the payment by adding together
+ Start price
+ Minutes Price
+ Sms and mms
+ Gprs and 3g
and regular payment month.

it may even come with a widget that shows the cost of the desk