Zadarma App for iOS and Zadarma App for Android use smart push notifications for work and other special features that do not allow using the apps for other VoIP services.
You can save your number and without trouble port it to our system. In this case, the number will be working with the app correctly. If you need to use several accounts of different operators, you can download an older version of Zadarma for Android; this version supports working with multiple operators. You can also connect a number of a different service provider to our service as an additional external line). This way the app will work correctly as it will be directed to our server