: Unlocking will void your warranty. On patched devices, it also removes layers of Verified Boot
Install the drivers located in the Flashtool-drivers.exe file within the tool's folder. Select Fastboot and Flashmode drivers.
Manufacturers frequently release security patches to close "loopholes" that allowed for unauthorized unlocking. se bootloader unlocking relocking 1662 patched
Unlocking your bootloader offers several benefits:
Unlocking the bootloader on a patched device can trip Knox, void your warranty, permanently disable some Samsung features (Samsung Pay, Secure Folder, etc.), and may brick your device if done incorrectly. Proceed at your own risk. : Unlocking will void your warranty
Then, and only then, can you run fastboot oem lock (or the device-specific command). But if the 1662 patch was applied via a firmware update, the exploit chain is broken—and any attempt to relock may permanently disable the device.
Unlocking a bootloader is the process of disabling the signature check that ensures only "authorized" software runs on the device. Then, and only then, can you run fastboot
A bootloader is a program that loads the operating system into memory when a device boots up. It's a critical component that determines what software can run on your device. A locked bootloader ensures that only authorized software can run, while an unlocked bootloader allows users to install custom operating systems, recoveries, and kernels.
If you must relock to return the phone for warranty: