(U/U1/W variants) does not have a simple "OEM Unlock" toggle in Developer Options like most Android phones. You cannot unlock it through standard fastboot commands. Instead, we must use a workaround, often referred to as:
: Confirm your device is a Snapdragon variant that supports unlocking (e.g., SM-G9600). U.S. carrier models (SM-G960U) will not show the necessary options.
Samsung blocks firmware downgrades using a security rollback index called "Bit" or "U" level. Look at your current Baseband Version in .
Back up all photos, contacts, and personal data to a computer or cloud service. Install the official Samsung USB Drivers on a Windows PC.
Flashing incorrect firmware files or interrupting the process can permanently brick your phone. Prerequisites and Preparation
| Issue | Solution | |-------|----------| | OEM Unlocking missing/gray | Not an unlockable model (G960U) or need 7 days active Samsung account | | fastboot oem unlock not recognized | Samsung’s fastboot is non-standard; try adb reboot bootloader then fastboot flashing unlock | | Device stuck in bootloop after unlock | Flash stock firmware via Odin (same version) | | KG Status: Prenormal | Wait 7 days with internet connection; it will change to CHECKING then allow unlock | | “Custom binary blocked by FRP” | Enable OEM unlocking and turn off Factory Reset Protection beforehand |
Completely lack the OEM Unlock toggle. The bootloader is cryptographically secured.
SM-G960U (US Carrier), SM-G960U1 (US Unlocked), SM-G960W (Canada).
Google's SafetyNet / Play Integrity verification will fail. You will need to use complex root-hiding tools (like Magisk DenyList and custom modules) to access apps like Google Pay, Pokémon GO, and strict banking applications.
Unlocking the bootloader triggers a mandatory factory reset. Back up all photos, contacts, and personal files before continuing.
of the device. North American models (U.S. and Canada) are typically hardware-locked and do not support official bootloader unlocking. Compatibility Check Before starting, identify your model number in Settings > About Phone
Go to Settings > About phone > Build number and tap on it 7 times. Then, go to Settings > Developer options > Enable OEM Unlock.
