LG Magna H502f Hard Reset Mode

LG Magna lg-H502f Hard reset: 

- Hold down Volume Down + POWER button 

- Release only POWER button when LG Logo appears 

- Press once POWER button while still holding Volume down

fastboot

# boot into fast boot mode
adb reboot boot loader

# get flashing ability status
fastboot flashing get_unlock_ability

fastboot oem unlock
fastboot flash unlock