SAMSUNG A12 SECURITY ERROR FIX AFTER ROOT FOR UNLOCK FIX FIX
This error occure becouse of some failed attemp to root.
Is important to flash this firmware version, if you have this one installed you can jump flashing firmware step.
After all these process completed check again OEM Unlocking option is there in developer settings.
Dont reboot device untill you see it or will need to perform all steps again.
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