That's exactly what TextSecure (now Signal) used to do[0]. Since the code is open-source, somebody has forked the SMS code and apparently kept it alive[1]. (It'

That's exactly what TextSecure (now Signal) used to do[0]. Since the code is open-source, somebody has forked the SMS code and apparently kept it alive[1]. (It's even on both F-Droid and Google Play.) [0] https://lwn.net/Articles/638621/ https://lwn.net/Articles/638621/ [1] https://git.silence.dev/Silence/Silence-Android/ https://git.silence.dev/Silence/Silence-Android/