The USSD Assistant offered you ussd codes and sms codes which can be used to activate different packages or services offered by different mobile service provider in the region. At the moment, only support for all providers in Sri Lanka (Dialog, Hutch, Etisalat, Mobitel, Airtel) and Airtel India. Application consist almost all the service codes and also updates regularly. So no need to memorize any codes.
These codes will helps you to activate different internet data packages, call packages, missed call alerts , value added services and much more with a single click and in most device, you can launch the code directly from the application.
Please submit any bugs if you find.