I’m planning to create an app to solve this issue.
The idea is to have the app auto answer the phone and ask for input:
- Press one to ring phone
- Press two to leave a message
- PIN Code to start phone alarm and IM GPS (lost phones)
- Call Blocking (White list/Black list)
- Custom greeting (Custom menu options)
I don’t have a working baseband on my dev kit tho, so I’ll start working on it again once I get a Librem 5.
ATM it is just a live DTMF Tone parser:
https://bitbucket.org/hackersgame/callen/