By default, Android manufacturers lock the bootloader to ensure that only trusted, officially signed operating system firmware can boot up. This prevents malicious third parties from flashing spyware or modified software if the device is lost or stolen.

Demystifying the "Bitly OEMUnlock Install" Search: A Safety and Technical Guide

Using unverified third-party software to force a bootloader exploit can permanently "brick" (destroy) your phone's motherboard, rendering the device useless. The Safe and Official Method to Enable OEM Unlock