Update: According to a T-Mobile spokesman, here are the spectrum bands that T-Mobile is using for its Home Internet service: LTE bands 2 (1900 MHz), 4 (1700/2100 MHz), 12 (700 MHz), 66 (1700/2100 MHz) and 71 (600 MHz), as well as 5G New Radio (NR) bands 41 (2.5 GHz) and 71 (600 MHz).