My Wifi calling works very well at home. At work, my calls are connected, but there is no audio. We ran a firewall log for my phone's IP, and found that it was opening the correct ports for the SIP portion of the call, but the RTP part is not getting through our firewall. It is trying to open ports in the 58,800 to 58,900 range, which I believe are universally blocked by our firewall. The normal port range for VoIP is in the 10,000 - 20,000.
Has anyone figured out how to get the Kineto\T-Mobile WiFi calling app to work on a network that is behind an enterprise firewall? Is there a range of ports that we could specify for use in with WiFi calls?