To trade in current device I had to revert it back to the stock ROM.I have T720 WIFI and dowloaded XAR from SamMobile - Samsung Galaxy Tab S5e (SM-T720) - XAR - T720XXS3DWA1 firmware. Hope that this is a correct version for a WIFI model.Using Odin I've flashed all the modules via sideload and as one video recommended checked "erase nand" option.Odin reported that everything was completed successfully but upon a reboot the tablet showed standard "powered for knox" and then switching to...Read more