Forum Discussion
Lost capability to text: Contacts show sip:[phone number]@msg.pc.tmobile.com;user=phone
Hello, I used to text this mobile phone for several months. I am using a Samsung Galaxy S21. However, today, the text fails to be sent. Then, I look at my contacts for the mobile phone number ...
I don't know what's going on but I can tell you that the SIP address looks like a long-ago backdoor to allow people to call T-Mobile phones from PCs and other Internet devices. It was closed down due to security concerns. I only found out about it a couple of weeks ago.
