I've been using Wi-Fi calling at my home (where I get very poor reception) for over a year now, on my HTC myTouch 4G, and it's worked flawlessly.
Until two days ago. I no longer noticed the blue wi-fi calling icon on the top taskbar, so I manually launched the app. I get an error message saying I'm not registered with T-Mobile network. So I click the "Register" button, but then the app just quits. If I restart it, and turn-on Wi-Fi Calling, it says Connection Error: W006.25 ISP or T-Mobile Network Error.
I've spoken to two Tech Support people at T-Mobile. We've done everything from resetting my Wi-Fi Router, to resetting my phone, removing the battery, clearing cache, and about a dozen other things. They blame my ISP for having "web redirection", but a call to Verizon Fios (my ISP) yields negative answers (no web redirection).
I haven't changed anything on my phone, my ISP, nor my router. I think this is T-Mobile's network issue, but it's been going on for two days.
Is anyone else having these issues? If not, can someone recommend a solution please?