This is with my home BYOD device, in my router logs I can see the RTP (media server) port being being used and the IP of the server. This issue is still happening today for TF numbers I didn't request to have support re-route. The interesting thing is that I tested this today by changing my dial plan to route TF calls through a free TF provider instead of Voipo and coincidentally they are also using this 207.223.64.xxx media server but I don't have the 30 second disconnect problem. That seems to indicate it's something on Voipo's side with this particular route.

I don't know if you can see the port details on your Android device, but it sounds to me that you're having the exact same problem I experienced. The only thing you can do at this point is open a support ticket and list the TF numbers you call and ask them to be re-routed.

Anyone from Voipo here (Tim you out there?) that can comment on this issue?