investigator thank you, I stand corrected on the proprietary bit, that is a valuable information. Can one use it for sending SMS as per OP request? You should be able to answer that since I presume you already use it. Or do you have another suggestion?
[deleted] Shouldn't SMS be deleted?
[deleted] I was thinking of replacing it with the RCS or something similar.
[deleted] there is no doubt that SMS is an old an insecure technology, but it's also far reaching since it allows communication with any device featuring a sim card even without access to internet and as such it still makes sense using it in certain scenarios. Although wherever it can be replaced with a suitable security/privacy alternative, such alternative should be used.
Just use Google Messages with RCS enabled or any SMS messaging app from F-Droid that is well maintained and doesn't have hundreds of issues.
This can be marked as solved; there is nothing else to add.
Maybe this was said but I'll add that I tried google messages app with out any google services installed and network permission revoked and it just works notifications and all . I don't think RCS works but if you want a nicer ui SMS app its worth considering .
After it was installed and set as default SMS app it synced all my messages from the default gos app as well .
Is it possible to setup Cheogram to handle SMS for an existing number?
user74838 No, but if you can port it to JMP you can use it through Cheogram.
newbie24689 You know who wrote/maintains it
GrapheneOS maintainers don't maintain the SMS app, The SMS app is a part of AOSP.
User2288 It should work because MMS is not dependent on Internet.