How to Unlock Bootloader on SAMSUNG Galaxy M12: Step-by-Step Guide

Preparing for Bootloader Unlock

• 💡 Unlocking the bootloader on your Samsung Galaxy M12 is useful for installing unofficial software like custom recoveries or ROMs.
• ⚠️ Before proceeding, back up all important data from your phone.
• 🔒 To prevent FRP (Factory Reset Protection) lock after the reset, log out of your Google account by going to Settings > Accounts and backup > Manage accounts.
• 📶 Ensure your phone is connected to the internet (Wi-Fi) as it's required for the unlock process.

Enabling Developer Options and OEM Unlocking

• 🌱 Navigate to Settings > About phone > Software information.
• 👆 Tap the Build number seven times to enable Developer Options. You may need to enter your screen lock PIN.
• ⚙️ Go back to Settings, and you will find Developer Options at the bottom. Enable it.
• ✅ Within Developer Options, find and enable OEM unlocking. If this option is not visible, ensure you have an active internet connection.

Entering Bootloader Mode and Unlocking

• 🔌 Power off your phone. It's recommended to unplug any connected cables.
• 🔋 Press and hold both Volume Up and Volume Down buttons simultaneously.
• 🔌 While holding the volume buttons, connect the phone to your PC using a USB cable.
• 🔵 You should see a blue screen indicating you've entered bootloader mode. Press and hold the Volume Up button to proceed.
• ❓ The phone will ask if you want to unlock the bootloader. Press Volume Up to confirm 'yes' or Volume Down to confirm 'no'.
• ⚠️ Be aware that unlocking the bootloader will reset your phone to factory settings.

Post-Unlock Setup and Verification

• ⏳ The phone will reset and restart, which may take approximately 5 minutes.
• 🚀 After the phone restarts, complete the initial setup. It's advised to connect to Wi-Fi during setup to allow the phone to verify the unlock status.
• 🔍 To verify the bootloader is unlocked, go back to Settings > About phone > Software information, tap the Build number seven times, then go to Developer Options.
• 🔓 If successful, OEM unlocking will be enabled and grayed out, with the text "Bootloader already unlocked" displayed underneath.