Due to the device's hardware limitations, Android 7.1.2 is widely considered the absolute maximum stable ceiling for this tablet.
: Boot into TWRP and perform a "Wipe" of Dalvik, Cache, System, and Data. : Transfer the ROM file to an SD card and use TWRP's menu to flash it. Optional GApps : If you want the Google Play Store, you must flash a (Google Apps) package immediately after the ROM. How to Install a Custom ROM on Any Android Phone (Example sm t285 custom rom android 7 free