While the process is free in terms of monetary cost, it carries significant "costs" regarding device integrity. Unlocking the bootloader triggers a mandatory factory reset, wiping all user data. More importantly, it typically voids the manufacturer's warranty and permanently breaks the "Verified Boot" chain. This can lead to security compromises, such as the inability to use high-definition streaming on Netflix (due to Widevine L1 downgrading to L3) or failures in SafetyNet/Play Integrity checks, which impact banking apps and Google Pay. Conclusion Unlocking the