That’s quite a question… I have 2 phones with different numbers.

My main phone with the number I give everyone to text/call me lives at home plugged in 100% of the time. SMS/MMS are bridged into self hosted Matrix. Signal, WhatsApp are also installed and bridged into matrix. Calls are forwared to a 3rd number with VoIP.ms.

The phone I keep on me has data only. I can still call and send SMS from the 2nd number but it’s expensive. I use a matrix chat app to send SMS/MMS/Signal/WhatsApp messages. I use a VoIP app for calls.

I have signal on my data only phone as a just in case to message/call my wife if things are down. I also thought I’d be a good idea to put notifications in signal as that’s my backup chat app.