Manufacturers constantly patch security loopholes that developers use to bypass bootloader restrictions. If your device currently says "No," the exploit required to change it might have worked on an older version of Android.
Would you like a command-line script that attempts all methods to flip that flag, or a deeper explanation of why it’s “No” for your specific device? bootloader unlock allowed no to yes
When a device is fully paid off, the carrier sends an over-the-air (OTA) signal to unlock the SIM slot. On some devices, this action simultaneously pings the manufacturer servers to update the device policy, switching the bootloader unlock permission to "Yes." When a device is fully paid off, the
Search developer communities like XDA Developers for specific exploit scripts (such as dirtycow or temp-root exploits) written for your specific older firmware to force-change the configuration flags. Method 3: Third-Party Paid Disruption Services bootloader unlock allowed no to yes