I just today returned my T-Mobile home internet Gateway FAST modem/router and cancelled my service after two days of connected but no internet and online activation people unable to activate the device due to a stuck SIM Card (unable to remove it) that they said needed for the numbers.
Also many hours yesterday dealing with useless tech support over ERROR CODE WANN002 that they cannot solve for a great many customers for over two years. Of course also tried all the phone and online trouble shooting methods but no joy.
Online cancel operators refused to cancel my service but kept sending me to tech support then activation unit then back to cancel. Finally they sent me a return label by email. Total waste of time for many hours. Spectrum internet is pricy but reliable at moderate speeds for my purpose now for many years.
Also still have the great AT&T Mobley car modem for my many out of state fishing trips and ATT Cell phone service. Still good to go. Rollin, Rollin, Rollin.