This indicates the security bit or binary version of the device. You can only flash a file that is equal to or higher than your current binary level.
It includes tools to test the screen, sensors, and touch functionality outside of the standard UI. Flashing Requirements & Procedure A035F U2 File PAC -Combination-
Turn off the device. Hold both Volume Up and Volume Down buttons while plugging it into the computer to enter the flash state. This indicates the security bit or binary version
/android-app