Possible Errors: [service].Error.InProgress
[service].Error.InvalidArguments
+ string RequestPhoneNumber()
+
+ Request a phone number from the AG, corresponding to the
+ last voice tag recorded in the HF. The AG may accept or
+ reject this request depending on its internal state.
+
+ This functionality is generally implemented by using
+ the +BINP=1 AT command.
+
+ Possible Errors: [service].Error.InProgress
+ [service].Error.InvalidArguments
+ [service].Error.Failed
+
Signals PropertyChanged(string property, variant value)
Signal is emitted whenever a property has changed.