How To Unlock Bootloader On Lenovo S5 Pro / GT using ADB Fastboot

Lenovo recently unveiled the successor of S5 known as Lenovo S5 Pro. The company also launched their extreme edition of S5 Pro with GT standard which comes with whooping 12GB RAM. Here in this guide we will teach you on how to Unlock Bootloader On Lenovo S5 Pro (L78071). To flash or root and even install custom ROM you need to unlock the bootloader on your device.

Now you can unlock bootloader easily by following this simple guide. Official Bootloader Unlock for Lenovo S5 Pro (L78071) will also void the device warranty. So if you planning to Unlock Bootloader On Lenovo S5 Pro, then it’s always better to wait until your warranty gets over. In case if you have unlocked the bootloader, then you can always relock the bootloader on your device anytime.

What is Unlock Bootloader?

A Bootloader is a code which runs when we turn on our device. This code initializes some hardware and then loads the kernel and ramdisk, and gets the boot process going. So this process is known as Bootloader. The same concept applies to all the technical stuff such as Laptop, PC, Smartphones and any such device. Every Android OEM manufacturers lock the bootloader even though it is an Open Source. So if you want to try any CUSTOM ROM, it is impossible to load the CUSTOM ROM without the Unlock Bootloader. So Manufacturer made a policy of making the smartphone with Unlocked Bootloader will void the warranty. They want you to stick with the Stock ROM. Unlock Bootloader allows you to Root your android smartphone, Flash TWRP and Custom ROM in a simple easy method.

Requirements:

• To Unlock Bootloader On Lenovo S5 Pro (L78071), you need a laptop or PC.
• Charge the Lenovo S5 Pro to a sufficient battery level to avoid any sudden shutdowns during the process.
• We strongly recommend you to take a complete full backup of your personal data, including the internal storage. The phone will be formatted, so be prepared for it. You can also follow our Android backup guide for the same.
• You need a USB cable to connect your phone to PC.

Required Files on your PC:

Steps for How to Unlock Bootloader On Lenovo S5 Pro (L78071)

1. First of all, enable the Developer Option
2. To Enable the Developer Option, Go to your Settings -> About -> Software Information -> More -> Now Tap on the Build Number 7-8 Times until you see a toast message “Developer option enabled“
3. Go back to settings -> Now you need to enable the OEM Unlock by going to Settings -> Developer Option and Enable OEM Unlock and USB Debugging
   
   
4. Download and Extract the Downloaded ADB fastboot Zip file on your PC.
5. Now connect your phone to Computer using USB Cable.
6. When you connect your Phone to Computer, please wait until all the drivers get installed.
7. In your ADB fastboot folder open a command prompt window by pressing Shift Key + Right Mouse Click 
8. Now type the command in your command window

   adb devices

9. If you see a pop up to allow USB Debugging on your phone, Click OK 
10. Now type the command below to reboot your phone to bootloader

    adb reboot bootloader

11. Once your phone reboot into bootloader, make sure your phone shows the bootloader locked and then type the command below to make sure fastboot drivers are installed properly.

    fastboot devices

12. This command will list the connected devices. If your phones serial number shows up you are good to go and may continue. If the phone is NOT listed this indicates that your drivers are not installed correctly. In order for you to continue, you must fix your drivers so that your phone is listed under fastboot devices.
13. If the phone has been recognized by the command above, proceed to unlock the bootloader with the following command:
    

    Remember that this step will wipe EVERYTHING off the phone 

    fastboot -i 0x2b4c oem unlock-go

14. After the above command has finished executing, run the following

    fastboot reboot

15. The phone will reboot. Wait until the phone has fully booted up into Android, and enjoy!

I hope this guide was helpful to Unlock Bootloader On Lenovo S5 Pro (L78071). If you have any queries or feedback, please leave a comment below.