Go to Settings > Developer Options and enable OEM Unlock and USB Debugging . Step-by-Step Installation Guide Step 1: Put your Tablet into Download Mode
Since you disabled Auto Reboot, your screen will still be in Download Mode. Force shut down by holding .
Go to Settings > Developer Options and enable OEM Unlock and USB Debugging . Step-by-Step Installation Guide Step 1: Put your Tablet into Download Mode
Since you disabled Auto Reboot, your screen will still be in Download Mode. Force shut down by holding . twrp3021smt560tar verified