We are actually trying to find a manual solution to upgrade/reset factory default the Motorola android devices ET1/MC40/TC55 using the adb tool.
The closest command line we have found is as below :
adb shell am broadcast -a com.motorolasolutions.intent.action.UPDATE_PACKAGE -n com.motorolasolutions.recovery/.recoveryUpdateReceiver --es file /sdcard/T55N0JB0VAFEN14500.zip
But the command doesn't return anything and it is not running.
I would really appreciate if we can find a way out of our problem.
Thank you all for your help.