1. Download and install the app from Google Play Store: https://play.google.com/store/apps/details?id=vn.calls.sip
  2. Launch the app and grant it all permissions.
    Enter the username in the Username field in the following format: SIPACCOUNTID@SIPSERVER
    Enter the password for the SIP identifier in the Password field.
    (You can access these identifiers from your account on the KOMPaaS Portal)
    And the contents of the third field: "UDP"
  3. Tap the ADD ACCOUNT button.

The app setup is almost complete.

Check the following settings:

Tap on "hamburger menu"

Check the following:


Connectivity settings:

Advanced settings:

Advanced settings: → Manage notifications:

Advanced settings: → App info: → Other permissions:

If the settings correspond to the above, then the application is ready and the application can be used.