How to Unlock Bootloader of Asus Zenfone 4 Pro ZS551KL Z01GD Easily [Simple Steps] will share a simple trick with Zenfone 4 Pro ZS551KL Z01GD owners who are trying to unlock bootloader of their phone. It comes with 7.6mm thickness, smudge-resistant oleophobic coating, hybrid dual SIM support and 175 grams weight. If you have recently bought Zenfone 4 Pro ZS551KL, then you might be planning to unlock its bootloader. As we know, bootloader is a program that starts whenever phone is turned on. It activates the Android operating system on Zenfone 4 Pro ZS551KL Z01GD. Locked bootloader does not allow us to install custom ROM on our phone. It only loads the authorized Android OS with a digital signature. will help you in unlocking Zenfone 4 Pro ZS551KL bootloader using Unlock Device App. You will be able to install custom ROM after unlocking bootloader. Previously, I have published the simple instructions for performing a hard reset of Redmi 9i. Now, I will discuss about the step-by-step tutorial to unlock bootloader of Asus Zenfone 4 Pro.

I am hoping that you will be able to unlock Zenfone 4 Pro ZS551KL Z01GD bootloader using Unlock Device App without facing any problem after reading the tutorial written in Don’t forget to activate developer options. You must note that your Zenfone 4 Pro ZS551KL Z01GD will lose warranty after the bootloader unlock process. It will let you install Custom ROM. You must activate OEM unlock option on your phone. Bootloader unlock process will also let you install Magisk, so you will be able to root your phone after unlocking its bootloader.

If you are planning to install official and unofficial LineageOS custom ROM on Zenfone 4 Pro ZS551KL Z01GD, then you must be eagerly waiting to unlock bootloader. You must save your important documents securely including messages and contacts before unlocking Zenfone 4 Pro ZS551KL bootloader, because there is a possibility of losing all documents from your phone during bootloader unlock process.

Below are the steps using which you can unlock Zenfone 4 Pro ZS551KL Z01GD bootloader. will not be responsible if your phone got broken during bootloader unlock process. Zenfone 4 Pro battery must be above 86 percentage before bootloader unlock process. You must follow these steps at your own risk.

How to Unlock Bootloader of Asus Zenfone 4 Pro ZS551KL Z01GD Easily [Simple Steps]

1. Tap “Settings”, then tap “Apps and notifications” on your phone.

2. Tap “Advanced”, then tap “Special app access”

3. Tap “Install unknown apps”, then select “Chrome” and enable “Allow from this source” option on Zenfone 4 Pro.

4. Open Chrome browser on your Zenfone 4 Pro and download Unlock Device App apk.

5. Install Unlock Device App apk on your phone.

6. Open Unlock Device App on your phone.

7. Tap “Press to Unlock your Device” button on your phone.

8. You have to wait for a few minutes to complete unlock bootloader process.

You have successfully unlocked bootloader of Zenfone 4 Pro ZS551KL Z01GD. If you are experiencing any difficulty while unlocking Zenfone 4 Pro bootloader, then don’t hesitate to share your issue with Please submit your email address and subscribe to get more information regarding Zenfone 4 Pro. You must check your email to activate subscription. I’ll help you in unlocking bootloader of your phone.

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