I’ve been trying everything to solve this. Getting Tmobile WiFi calling to work on the Mudi 7. It works fine on my spitz ax 3000 even in airplane mode. When I have my vpn on it works fine too. But when I turn the vpn off the WiFi calling becomes intermittent and it doesn’t work in airplane mode so something is wrong.
I’ve tried everything I can think of. Imei change, TTL/hl change to 65, disabling network acceleration, enabling upnp, etc. I tried copying the settings from the spitz but still doesn’t fix it (unless I’m missing a setting). For some reason my spitz and vpn allow WiFi calling to work as intended, while the Mudi has issues natively. I have a dish network sim as sim 2 and WiFi calling works for that sim too. Any help/suggestions?