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Android ROMs. Want Sortable ROMs? Check out my new ROMs page in beta and let me know what you think. Alcatel ROMs. Coolpad ROMs. Elephone ROMs. Google Device ROMs. Warning: Rooting, or flashing a custom ROM may void device warranty. Check if your carrier allows unlocking the bootloader. Even if your device's manufacturer allows unlocking the bootloader and your device is supported, your carrier may still block it.
Understand the risks and limitations. When you unlock your bootloader, you typically void any warranty that is currently active. You also break the DRM on your device, which can cause problems with streaming music services. Unlocking your bootloader also disables Apple Pay as a security measure.
Finally, throughout the entire process you run the risk of permanently disabling your device. Download the Android SDK tools you'll need. You'll need a few utilities on your computer in order to proceed with unlocking your bootloader. Visit the Android developer website. Scroll down to the "Get just the command line tools" section at the bottom of the page. Click the link for the ZIP file for your operating system. Place the ZIP file in a folder that you want the tools to be located in.
Extract the ZIP file. Double-click the ZIP file after you've placed it in its folder and click the "Extract" option. This will display a list of available SDK tools. This is the only software you'll need for unlocking your bootloader. Click Install. Download and install the USB drivers for device. You'll be able to find these on the support page of your device's manufacturer's website. Make sure to download the drivers that match your device's model.
Open the platform-tools folder in the folder your SDK tools are in. This folder was created when you installed the SDK software. Make sure you right-click in a blank spot. Click Open command window here.
A Command Prompt window will appear already set to the correct location. You should see your device's serial number.
Scroll to the bottom and tap About phone. Tap the Build Number entry seven times. This will enable the Developer Options menu.
Return to Settings and tap Developer Options. Enable OEM unlocking if present. Not all phones will display this option, and it is only necessary if it is there. Enable USB debugging. This allows you to send commands to your Android through ADB. Open your device manufacturer's unlock code procedure instructions. The following process will vary depending on your phone manufacturer. Be sure to follow the instructions they provide exactly. What follows here is a general guide.
Reboot your device into the fastboot menu. The process for this will vary depending on your device, but generally you'll need to turn off your phone and then hold Power and Volume Down for 10 seconds. Type the unlock key retrieval command in ADB. This command is different for every manufacturer. Make sure your Android device is still connected to your computer and the Command Prompt window is open from the platform-tools folder. Copy the device ID code. You'll see a long code appear on the screen, and it may be broken up into several lines.
Click and drag to highlight the entire code. Submit your device ID code to the manufacturer. Use the bootloader unlock code request form to submit your code and request your unlock code.
This can take a week or two, depending on the manufacturer. Run the command specified by your manufacturer. When you receive your unlock code, you'll be given the command to use to apply it to your device. This command varies depending on the manufacturer. Your Android will need to be connected to your computer and in fastboot mode. For Nexus devices, run fastboot oem unlock , or fastboot flashing unlock for the Nexus 5X and newer.
The command for your manufacturer may be different. Confirm that you want to unlock. You may be prompted by your phone to confirm the unlock. Type fastboot reboot on your computer. This command will reboot your device and exit fastboot mode. Look for the Bootloader Unlocked message. You'll see this message every time you turn on your device as a security measure. Make sure your device boots completely into the Android operating system as normal.
You're now ready to install a custom recovery. Find and follow a device-specific guide if you can't unlock the bootloader. If your manufacturer or carrier will not allow you to unlock the bootloader, your only other option is to find and use an exploit to bypass it. This process is different for every phone model, and some phones simply cannot be unlocked at all.
The best place to get started are the XDA Forums. Find your phone model and look for any bootloader unlocks released by the community. When performing an unlock using an exploit, be sure to follow every step in the XDA thread exactly, as the risk for bricking your device increases dramatically when not using official methods.
Part 2. Visit the TWRP website. Click the Devices tab. Verify that your device is supported. If your device is not on this list, try a different recovery environment like CWM.
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