Our VoIP line worked fine with T Mobile 5G home internet gateway/router for 6 months until recently when we were not able to call out. Our old Obitalk 200 voip phone adapter was unable to call out as it could not get a IP.
All I did was install our 10 year old router between the phone adapter and the T-Mobile gateway with ethernet cable and it worked again. Make sure the router you install either doesn’t use the same ssid as tmobiles gateway or just turn off the routers WiFi radio so it’s not conflicting with t mobile’s gateway.
Im assuming the T-Mobile gateway received a update and started to block the adapter. Hope this helps, I only tried it after seeing one other post about a magic jack customer doing the same.
