The tablet AT&T Primetime K92 running on the OS Android 7.1.1 Nougat. Display size 10.1 ", 1920 x 1200 pixel screen resolution. The tablet is able to work in networks GSM: 850 MHz/ 900 MHz/ 1800 MHz/ 1900 MHzUMTS: 850 MHz/ 1700/2100 MHz/ 1900 MHzLTE: 850 MHz/ 1700/2100 MHz/