Twilio is the PBX and gateway for calls + texts. I run a server that lets me receive calls wherever I am (SIP or forwarding, as required) and send messages. Li

Twilio is the PBX and gateway for calls + texts. I run a server that lets me receive calls wherever I am (SIP or forwarding, as required) and send messages. Like a self-hosted Google Voice but more flexible and with a greater choice of numbers + forwarding destinations. All my server does is respond to HTTP requests from Twilio and send HTTP requests when I send a message. Somewhere in the Twilio interface, you can define a SIP endpoint, but I forget where it is. That's enough for placing calls and does not require running a server. Almost forgot to mention that I receive text notifications via pushover because I am not an Apple developer ... so no app for me.