There's an SMS bridge for Matrix right now, and has been for awhile. Caveats are that I have only seen the Android client when browsing F-Droid, and I haven't t

There's an SMS bridge for Matrix right now, and has been for awhile. Caveats are that I have only seen the Android client when browsing F-Droid, and I haven't tried it myself yet. All the other bridges I do use (Whatsapp, Telegram), however, have been top notch