Is it even possible on android? Is there a FOSS dialer to optionally encrypt some phone calls (non voip) using a pre-shared key with other party?
Is it even possible on android? Is there a FOSS dialer to optionally encrypt some phone calls (non voip) using a pre-shared key with other party?
Yeah third party apps can do end to end encryption. It uses the data network and not the cellular network then though.
Google Fi on Android actually does run E2E on calls https://fi.google.com/about/end-to-end-encrypted-calls/