Hibrid or native app for android, iphone and other hand held mobile devices.
The app would basically have the functionality of scanning(OCR) an a number characters from an image taken from camera or gallery and dial a number with the code using the phone dialer to refill the phone account or another phone number.
Refilling another number will ask to enter the phone number user wants to refill other and include it in the dialing code otherwise it will make a call to a short number followed by the scanned numbers.
The design should be simple enough and easy to use by any user.
The app should be also able to display a none destructive ad.