How to Unlock Android Bootloader Safely

Author: BIGS MOBILE TECH | Updated: October 2025

🔹 Introduction

The bootloader controls the Android startup process. Unlocking it allows you to install custom ROMs, mods, or root your device. This guide explains how to safely unlock the bootloader without damaging your phone.

1️⃣ Preparation

• Backup all important data — unlocking will erase everything.
• Charge your device to at least 60%.
• Enable Developer Options: Settings → About Phone → Tap Build Number 7 times.
• Enable OEM Unlocking and USB Debugging in Developer Options.
• Install ADB and Fastboot on your PC.

2️⃣ Step-by-Step Guide

1. Connect your phone to the PC via USB.
2. Open a command prompt/terminal and type: adb reboot bootloader.
3. Once in bootloader mode, type: fastboot oem unlock or device-specific command.
4. Confirm the unlock on your device if prompted.
5. Reboot the device: fastboot reboot.

💡 Tips & Warnings

• Unlocking the bootloader will void warranty on some devices.
• Always backup your data before starting.
• Use official or trusted commands to prevent bricking.

📚 Related Guides

• Install Custom ROM on Android Phones
• TECNO BF6 Firmware Update & Flashing Guide
• Hard Reset Any Android Phone

📝 Conclusion

Unlocking the bootloader opens up customization possibilities. Follow these steps carefully, backup your data, and ensure commands are correct for your device.

Last updated: October 2025