The app is very simple. This app must do just the following:
1) When any call is received, during the ring on the mobile device, just pop-up a message with a button to transfer the call
2) if the user press the button of the app to transfer the call
2a) answer the call
2b) play an audio prompt
2c) transfer the call to the configured phone number
3) if the user ignore the pop-up nothing must be done.
The Mobile phone app must have the following configuration options:
- Transfer or conference
- phone number to transfer or conference.
This app must be always in execution on the mobile device and pop-up in the notification asking for transfer the call.