Upon accessing the Another Number app for the first time, the app requires access to the following permissions in order to fully operate:
This is essential for the app to perform contacts resolution when viewing messages/calls in the call and for displaying contact information when making and receiving calls.
This is used for when handling calls over data, recording greetings and playing back voicemail messages.
Allows the app to receive push notifications for calls and messages.
Make sure you allow Another Number access to these permissions in order to use the app properly. You should get these pop-ups after signing in/up.
Alternatively this can be done from your iPhone settings by selecting:
Settings -> Another Number -> Contacts/ Microphone/ Notifications