User tries to flash TWRP via fastboot but gets failed -remote 39-flashing lock flag is locked.
: Most devices ship with a locked bootloader to ensure the device remains in a state produced by the manufacturer (OEM). User tries to flash TWRP via fastboot but
: In your device's Settings > Developer Options , you must toggle on OEM Unlocking . If this option is greyed out, your device may be carrier-locked or require an internet connection to "check in" with the manufacturer's servers. If this option is greyed out, your device
: Navigate to Settings > System > Developer Options and switch on OEM Unlocking . fastboot oem unlock (Common for older devices)
Once in bootloader mode, use one of the following commands depending on your device: fastboot flashing unlock (Standard for newer devices). fastboot oem unlock (Common for older devices). Confirm on Device