Most manufacturers consider third-party bootloader unlocking a warranty violation. Even if you re-lock the bootloader, there may be a fuse (like the Samsung Knox counter) or a changed nvdata flag that techs can detect.
If you answered "yes" to all of the above, proceed with caution. Download from reputable communities, follow guides precisely, and never, ever disconnect the USB cable during the unlock process. Smt Bootloader Unlock Tool
Using non-official tools like SMT comes with significant security and hardware risks: follow guides precisely
As Google pushes and hardware-backed security (StrongBox Keymaster), brute-force unlocking tools like SMT are becoming obsolete. The industry is moving toward: Smt Bootloader Unlock Tool