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Unlocking a device’s bootloader gives users more control over their operating system, allowing for custom ROM installations, rooting, and other advanced functionalities. However, the process can be complicated for those unfamiliar with it. This article serves as a guide to demystify the procedure, ensuring you can safely achieve an unlocked bootloader. Whether you’re an Android enthusiast looking to dive deeper into device customization or simply seeking to understand the process, this article is your roadmap.
A bootloader is a small software program that runs every time a computer or a device starts up. Its main role is to initialize the system’s hardware and then load the operating system (OS) into the system’s memory. For most computers, the bootloader loads the main OS from the device’s hard drive. In the context of mobile devices, like smartphones and tablets, the bootloader can also decide if it should load the main OS or some recovery OS.
Here are a few key points about bootloaders:
In essence, the bootloader serves as a bridge between the device’s hardware and its operating system, ensuring the system boots up both correctly and securely. Let’s explore how to unlock the bootloader using fastboot in the following section.
Unlocking the bootloader of an Android device from an Ubuntu system involves using the fastboot utility. Before starting, always remember to back up your device as this process can wipe your data.
Here’s a step-by-step guide:
1. Backup Your Data. Always ensure you have a backup of your data, as unlocking the bootloader will likely erase everything on your device.
2. Install Fastboot on Ubuntu. Open the terminal and install the necessary tools using this command:
sudo apt update sudo apt install android-tools-adb android-tools-fastboot
This step installs both the ADB (Android Debug Bridge) and Fastboot tools, necessary for communicating with the device.
3. Enable Developer Options on Your Android Device. The following instructions apply to your phone. Here are the steps below:
 ⢠Go to “Settings” then tap on “About phone” on your device.
⢠Tap on “Build Number” multiple times (usually seven) until you see a message saying, ‘You are now a developer!’
⢠There are some cases you can also search āDeveloper Optionsā on your device.
Please note that the process may vary for different Android phones. Refer to your phone manufacturer’s documentation to access the āDeveloper Modeā.
4. Enable USB Debugging and OEM Unlock on Your Android Device. After accessing ‘Developer Mode’, please follow the subsequent steps detailed below:
5. Connect Your Android Device to Ubuntu. Using a USB cable, connect your Android device to your Ubuntu computer. Once it is connected, in the terminal type the command:
adb devices
This confirms your device is connected and recognized by ADB. It will show the serial number followed by ādeviceā. You should see your device listed. If asked on your device, allow USB debugging permissions.
6. Boot Your Device into Fastboot Mode. Use the following command to reboot your device into bootloader mode:
adb reboot bootloader
This command restarts the Android device into the bootloader (or fastboot) mode.
7. Unlock the Bootloader. Once in bootloader mode, use this command to unlock the bootloader:
fastboot oem unlock
This command initiates the bootloader unlocking process. It’s essential to follow any on-device instructions. Follow any on-device instructions to confirm the unlock process.
8. Reboot Your Device. After the bootloader is unlocked, reboot your device using:
fastboot reboot
This restarts your device after the bootloader has been unlocked. Then your device will likely go through a factory reset, so you’ll need to set it up again.
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