Hi everyone. Did anybody ever tried to connect asterisk to t-mobile network using their "wifi calling" feature? From what I was able to find it's just SIP over TLS using phone number, IMEI (not sure why) and IMSI to authenticate. Trying to make this work to be able to use my existing cell number to receive/send calls in the office if possible. This document describes some details, I just dont want to reinvent the wheel if somebody did already... https://www2.eecs.berkeley.edu/Pubs/TechRpts/2013/EECS-2013-18.pdf Martin