Lost capability to text: Contacts show sip:[phone number]@msg.pc.tmobile.com;user=phone

Hello everyone. My wife has had the very same problem, so I came here to see if anyone would have a fix. And, no, however, I have fixed mine. I tried the clear default thing and it didn't work. Ok, my wife had a group chat set up up with her, me, and my son. i sent a text with her phone, through the group chat and I received it. I sent a reply and the group chat received it. After that I noticed on my wife's phone that my number was back to normal. I then sent a message from her to me and badaboom, it was fixed.

I don't know if it will work for everyone else, but maybe set up a group chat and try it. Hope it helps everyone. Merry Christmas!!