This is a supplement app for our callback customers to use the callback from various different countries to different destination.
Customer has to have a separately purchased callback card (along with the PIN and password) from us in order to use the application.
The application is strict forward and easy to use, from our callback customer point of view.
- Add call number validation, in general follows IDD international standard format
i.e. cc ac nn.
9Apps 4.9
