Mobile networks (like Verizon, AT&T, or EE) lock bootloaders to prevent you from taking a subsidized phone to another network or altering the firmware.

– On certain devices, you can force the flag to yes using:

Tap seven times consecutively until a toast message says "You are now a developer."

Check your status again. If it changed to "Yes," you can proceed to use fastboot commands to unlock.

Your device is less secure against malicious software.

: Unlike SIM locking, which prevents using other networks, this flag prevents the use of fastboot commands to flash custom recovery images or ROMs. 2. Primary Methods for Transitioning to "Yes"