I did this with TMobile when they had get 3 lines and get 4th free. I use the 4th free line as my 2FA. The 2FA line is an old android phone and is always plugge

I did this with TMobile when they had get 3 lines and get 4th free. I use the 4th free line as my 2FA. The 2FA line is an old android phone and is always plugged in & on in my basement. I have a little script on the phone that reports any SMS messages a db running on my home server (RPi) and I access it with in my network (or via VPN).