How to Lock Bootloader on SAMSUNG Galaxy A52 4G: Step-by-Step Guide

Preparing to Lock Bootloader

• 💡 Locking the bootloader on your Samsung Galaxy A52 4G enhances device security by preventing unauthorized modifications.
• ⚠️ Important Data Warning: This process will erase all data on your phone. Ensure all important files are backed up before proceeding.
• 🔌 You will need a data transfer capable USB-C cable and a computer.

Entering Bootloader Mode

• 🔌 First, power off your Samsung Galaxy A52 4G by holding the power and volume down buttons.
• 💻 Connect the USB-C cable to your computer, then press and hold the volume up and volume down buttons on the phone.
• 🔌 While holding the volume buttons, plug the USB-C cable into the phone and continue holding until a blue screen with text appears.
• ⬆️ Press and hold the volume up button until the screen turns off, then release.

Locking the Bootloader

• ❓ The device will prompt you to lock the bootloader. Press volume up to confirm 'Yes' if your bootloader is unlocked and you wish to lock it.
• ⏳ The phone will then proceed to erase all data and restart. This process may take some time.
• 🔌 You can unplug the phone from the computer once the data erasure begins.

Post-Lockdown Security Steps

• 📶 After the phone restarts and you complete the initial setup (connecting to Wi-Fi is recommended), navigate to Settings > About phone > Software information.
• 👆 Tap on the Build number seven times to enable Developer Options. Enter your screen lock if prompted.
• ⚙️ Go back to Settings, scroll down to Developer Options, and disable OEM unlocking to prevent future bootloader unlocks without re-enabling it first.
• 🔄 Restart your phone to apply the changes. You can then optionally turn off Developer Options from within the Developer Options menu for added security.