I'm not sure what you're trying to do? What is the point of disconnecting a device from, presumably, the gateway? Why not just turn the device off or unplug it?

I have the same issue with a device that I don't recognize. I have a neighbor that can get on to it and I know the names of their devices. I have been all over Tmo for some time know and get about the same  crap as bocaboy retarded comment. Friqueing geniuses! Kirkcountry, did you ever get a solution, if so which line of TMobile's script of troubleshooting worked, ? Restart device , power cycle , let me check something's,... There's work being done on the tower your pinging off off , they have 900 seconds to get customer off the phone or they get wrote up . If customer calls back within 7 days they get wrote up and docked..