How to Unlock Bootloader on Samsung Galaxy S21 FE 5G

Prerequisites for Bootloader Unlocking

• 💡 Ensure your Samsung Galaxy S21 FE 5G is connected to Wi-Fi, as this process communicates with the manufacturer and may affect warranty.
• ⚠️ Unlocking the bootloader will reset your device, so it's crucial to back up all your data beforehand.
• 🔒 Remove your Google account from the device before proceeding to avoid potential FRP (Factory Reset Protection) lock.

Enabling Developer Options and OEM Unlocking

• ⚙️ Navigate to About phone > Software information and tap the Build number seven times to enable Developer Options.
• 🔑 Within Developer Options, locate and enable OEM unlocking.
• 🔌 If OEM unlocking is not visible, ensure you are connected to the internet, restart your phone, and check again.

Entering Download Mode and Unlocking

• 🔌 Power off your phone. Connect a USB cable to your computer or charger.
• ⬆️ Hold both Volume Up and Volume Down buttons simultaneously.
• ⚡ While holding the volume buttons, plug the USB cable into your phone.
• ⚠️ A warning screen will appear. Press and hold Volume Up to confirm entering download mode.
• 🔓 On the unlock bootloader screen, press Volume Up to confirm the unlock.

Post-Unlock Process and Verification

• 🔄 The phone will perform a factory reset and restart, which may take several minutes.
• ✅ Once the phone restarts, set it up again. To verify, go to Settings > About phone > Software information, tap Build number seven times, then go to Developer Options.
• 🔒 If OEM unlocking is enabled and grayed out, the bootloader has been successfully unlocked.