How to Unlock Bootloader ASUS Zenfone 4 Max Pro ZC554KL Using Unlock Tool Apps Latest Update

How to Unlock Bootloader ASUS Zenfone 4 Max Pro ZC554KL Using Unlock Tool Apps


Bootloader is a application that loads whilst your ASUS Zenfone 4 Max Pro ZC554KL boots and checks to make sure the entirety is as it have to be. More in particular, the bootloader is seeking out any unofficial software that the producer or your provider hasn’t signed off on.
Bootloader is a completely critical a part of your ASUS Zenfone 4 Max Pro ZC554KL protection. That's what stops unapproved and doubtlessly risky 1/3-birthday party software program from doing actual harm. This additionally stops you from doing all sorts of amusing matters, like rooting to put in advert blockers, or flash special ROMs.
Obviously, unlock Bootloader is an attempt to risk the security of your ASUS Zenfone 4 Max Pro ZC554KL, but, if you are ready to take all the risks that will occur, that is your right. I am here just telling you how to unlock Bootloader ASUS Zenfone 4 Max Pro ZC554KL using the official application from ASUS.com known as "Unlock Device Tool Apps".
Optional: If you want Stock ROM ASUS Zenfone (All Models), you can get it within the "Download Stock ROM ASUS Zenfone (All Models)" submit and to get RAW Firmware for ASUS Zenfone, you may get it inside the publish "Download RAW ASUS Firmware (All Models) ". And also you could get ASUS Flash Tool for Flashing Firmware purposes within the post "Download ASUS Flash Tool (All Versions)". Hope it let you.
Well, I assume you understand what I said before, now you can follow step by step below to unlock Bootloader your ASUS Zenfone 4 Max Pro ZC554KL.
  • Charge your ASUS Zenfone 4 Max Pro ZC554KL, at least 70% or extra.
  • Backup your data, unlocking Bootloader will delete your mobile data, so it is recommended to backup data.
  • Allow installation of programs from unknown resources, even though the reputable "Unlock Device Tool Apps" application comes from ASUS.com, however all Androids will block packages from different events who want to put in the APK utility except from the Play Store. The solution is to open the "Unknown Sources" characteristic within the "Settings" -> "Security" -> Device Administration.
How to Unlock Bootloader ASUS Zenfone 4 Max Pro ZC554KL Android Devices Using Unlock Device Tool Apps
Unknown Sources

  • Download the APK document software inside the post "Download ASUS Zenfone 4 Max Pro ZC554KL Unlock Device Tool Apps". Not all of these packages are with APK extensions, however there also are ZIP compresses. If you discover a ZIP file, make sure you do UNZIP.
  • After you get the APK report in question, now insert the file into your ASUS Zenfone 4 Max Pro ZC554KL tool, with the aid of connecting your cellphone with a computer the use of a USB cable, positioned the APK file in your ASUS Zenfone 4 Max Pro ZC554KL storage.
How to Unlock Bootloader ASUS Zenfone 4 Max Pro ZC554KL Android Devices Using Unlock Device Tool Apps
ASUS Zenfone 4 Max Pro ZC554KL Unlock Apps

  • Now is the time to install the "Unlock Device Tool Apps" software on your ASUS Zenfone 4 Max Pro ZC554KL device, by tapping it twice. After you tap it, you will see a warning message about unlocking Bootloader, check the approval box at the bottom.
How to Unlock Bootloader ASUS Zenfone 4 Max Pro ZC554KL Android Devices Using Unlock Device Tool Apps

  • Now, press the unencumber button "PRESS TO UNLOCK YOUR DEVICE".
How to Unlock Bootloader ASUS Zenfone 4 Max Pro ZC554KL Android Devices Using Unlock Device Tool Apps

  • After you run the "ASUS Unlock Tool" software on your ASUS Zenfone 4 Max Pro ZC554KL, your mobile will restart. This does no longer take too lengthy from the usual boot cycle. Your cellular telephone won't sense distinct, however relaxation assured, it is no longer the identical tool five mins ago. You will see a short warning when the telephone boots so that you realize that it cannot check the damaged report due to the fact the bootloader is not locked. That means you are ready to explore the crazy global of custom ROMs, kernels, and recovery!

Source: //edgeup.asus.com/2017/zenfone-bootloader-release-manual/

How to Unlock Bootloader ASUS Zenfone Selfie ZD551KL Using Unlock Tool Apps Latest Update

How to Unlock Bootloader ASUS Zenfone Selfie ZD551KL Using Unlock Tool Apps


Bootloader is a program that loads while your ASUS Zenfone Selfie ZD551KL boots and exams to make sure the entirety is because it have to be. More in particular, the bootloader is searching out any unofficial software that the producer or your carrier hasn’t signed off on.
Bootloader is a very important part of your ASUS Zenfone Selfie ZD551KL safety. That's what stops unapproved and potentially dangerous 0.33-birthday celebration software from doing real damage. This additionally stops you from doing all styles of a laugh matters, like rooting to put in advert blockers, or flash unique ROMs.
Obviously, unlock Bootloader is an attempt to risk the security of your ASUS Zenfone Selfie ZD551KL, but, if you are ready to take all the risks that will occur, that is your right. I am here just telling you how to unlock Bootloader ASUS Zenfone Selfie ZD551KL using the official application from ASUS.com referred to as "Unlock Device Tool Apps".
Optional: If you want Stock ROM ASUS Zenfone (All Models), you can get it inside the "Download Stock ROM ASUS Zenfone (All Models)" publish and to get RAW Firmware for ASUS Zenfone, you may get it in the put up "Download RAW ASUS Firmware (All Models) ". And also you may get ASUS Flash Tool for Flashing Firmware purposes in the submit "Download ASUS Flash Tool (All Versions)". Hope it can help you.
Well, I assume you understand what I said before, now you can follow step by step below to unlock Bootloader your ASUS Zenfone Selfie ZD551KL.
  • Charge your ASUS Zenfone Selfie ZD551KL, as a minimum 70% or greater.
  • Backup your data, unlocking Bootloader will delete your mobile data, so it is recommended to backup data.
  • Allow set up of applications from unknown assets, even though the reputable "Unlock Device Tool Apps" utility comes from ASUS.com, but all Androids will block programs from different events who want to install the APK utility except from the Play Store. The answer is to open the "Unknown Sources" characteristic inside the "Settings" -> "Security" -> Device Administration.
How to Unlock Bootloader ASUS Zenfone Selfie ZD551KL Android Devices Using Unlock Device Tool Apps
Unknown Sources

  • Download the APK report utility in the publish "Download ASUS Zenfone Selfie ZD551KL Unlock Device Tool Apps". Not all of these applications are with APK extensions, however there are also ZIP compresses. If you discover a ZIP document, make sure you do UNZIP.
  • After you get the APK file in question, now insert the document into your ASUS Zenfone Selfie ZD551KL tool, by connecting your cellular phone with a computer using a USB cable, put the APK report for your ASUS Zenfone Selfie ZD551KL storage.
How to Unlock Bootloader ASUS Zenfone Selfie ZD551KL Android Devices Using Unlock Device Tool Apps
ASUS Zenfone Selfie ZD551KL Unlock Apps

  • Now is the time to put in the "Unlock Device Tool Apps" utility to your ASUS Zenfone Selfie ZD551KL device, by tapping it twice. After you tap it, you will see a warning message about unlocking Bootloader, check the approval box at the bottom.
How to Unlock Bootloader ASUS Zenfone Selfie ZD551KL Android Devices Using Unlock Device Tool Apps

  • Now, press the liberate button "PRESS TO UNLOCK YOUR DEVICE".
How to Unlock Bootloader ASUS Zenfone Selfie ZD551KL Android Devices Using Unlock Device Tool Apps

  • After you run the "ASUS Unlock Tool" utility to your ASUS Zenfone Selfie ZD551KL, your cellular will restart. This does no longer take too lengthy from the same old boot cycle. Your cellular telephone may not feel exceptional, however relaxation assured, it's not the same device five mins in the past. You will see a brief warning whilst the phone boots so that you understand that it cannot check the broken record due to the fact the bootloader isn't always locked. That method you're ready to discover the crazy international of custom ROMs, kernels, and recovery!

Source: //edgeup.asus.com/2017/zenfone-bootloader-unlock-manual/

How to Unlock Bootloader ASUS Zenfone 5Z ZS621KL Using Unlock Tool Apps Latest Update

How to Unlock Bootloader ASUS Zenfone 5Z (ZS621KL) Using Unlock Tool Apps


Bootloader is a program that hundreds whilst your ASUS Zenfone 5Z ZS621KL boots and exams to make certain the whole thing is as it ought to be. More particularly, the bootloader is searching out any unofficial software that the producer or your carrier hasn’t signed off on.
Bootloader is a completely crucial a part of your ASUS Zenfone 5Z ZS621KL security. That's what stops unapproved and probably risky 0.33-birthday party software program from doing real harm. This additionally stops you from doing all types of fun matters, like rooting to put in ad blockers, or flash special ROMs.
Obviously, unlock Bootloader is an attempt to risk the security of your ASUS Zenfone 5Z ZS621KL, but, if you are ready to take all the risks that will occur, that is your right. I am here just telling you how to unlock Bootloader ASUS Zenfone 5Z ZS621KL using the official application from ASUS.com referred to as "Unlock Device Tool Apps".
Optional: If you want Stock ROM ASUS Zenfone (All Models), you could get it in the "Download Stock ROM ASUS Zenfone (All Models)" publish and to get RAW Firmware for ASUS Zenfone, you can get it within the put up "Download RAW ASUS Firmware (All Models) ". And also you can get ASUS Flash Tool for Flashing Firmware functions inside the post "Download ASUS Flash Tool (All Versions)". Hope it will let you.
Well, I assume you understand what I said before, now you can follow step by step below to unlock Bootloader your ASUS Zenfone 5Z ZS621KL.
  • Charge your ASUS Zenfone 5Z ZS621KL, at the least 70% or more.
  • Backup your data, unlocking Bootloader will delete your mobile data, so it is recommended to backup data.
  • Allow installation of applications from unknown assets, even though the respectable "Unlock Device Tool Apps" application comes from ASUS.com, however all Androids will block programs from other events who need to put in the APK utility except from the Play Store. The answer is to open the "Unknown Sources" function in the "Settings" -> "Security" -> Device Administration.
How to Unlock Bootloader ASUS Zenfone 5Z ZS621KL Android Devices Using Unlock Device Tool Apps
Unknown Sources

  • Download the APK record application inside the put up "Download ASUS Zenfone 5Z ZS621KL Unlock Device Tool Apps". Not all of these programs are with APK extensions, but there are also ZIP compresses. If you discover a ZIP record, ensure you do UNZIP.
  • After you get the APK document in query, now insert the file into your ASUS Zenfone 5Z ZS621KL tool, through connecting your cellular phone with a computer the usage of a USB cable, placed the APK record in your ASUS Zenfone 5Z ZS621KL garage.
How to Unlock Bootloader ASUS Zenfone 5Z ZS621KL Android Devices Using Unlock Device Tool Apps
ASUS Zenfone 5Z ZS621KL Unlock Apps

  • Now is the time to install the "Unlock Device Tool Apps" utility in your ASUS Zenfone 5Z ZS621KL device, by tapping it twice. After you tap it, you will see a warning message about unlocking Bootloader, check the approval box at the bottom.
How to Unlock Bootloader ASUS Zenfone 5Z ZS621KL Android Devices Using Unlock Device Tool Apps

  • Now, press the unencumber button "PRESS TO UNLOCK YOUR DEVICE".
How to Unlock Bootloader ASUS Zenfone 5Z ZS621KL Android Devices Using Unlock Device Tool Apps

  • After you run the "ASUS Unlock Tool" utility in your ASUS Zenfone 5Z ZS621KL, your cellular will restart. This does no longer take too long from the same old boot cycle. Your cellular telephone won't experience different, however relaxation assured, it's now not the equal tool five mins ago. You will see a quick warning when the phone boots so that you realize that it can not check the damaged record due to the fact the bootloader isn't always locked. That approach you're ready to discover the loopy global of custom ROMs, kernels, and recovery!

Source: //edgeup.asus.com/2017/zenfone-bootloader-release-guide/

How to Unlock Bootloader ASUS Zenfone 5z ZS620KL Using Unlock Tool Apps Latest Update

How to Unlock Bootloader ASUS Zenfone 5z ZS620KL Using Unlock Tool Apps


Bootloader is a program that loads when your ASUS Zenfone 5z ZS620KL boots and assessments to make certain the whole thing is because it must be. More specifically, the bootloader is looking for any unofficial software that the producer or your carrier hasn’t signed off on.
Bootloader is a very critical part of your ASUS Zenfone 5z ZS620KL safety. That's what stops unapproved and doubtlessly risky third-celebration software from doing real harm. This also stops you from doing all sorts of fun things, like rooting to install ad blockers, or flash special ROMs.
Obviously, unlock Bootloader is an attempt to risk the security of your ASUS Zenfone 5z ZS620KL, but, if you are ready to take all the risks that will occur, that is your right. I am here just telling you how to unlock Bootloader ASUS Zenfone 5z ZS620KL using the official application from ASUS.com referred to as "Unlock Device Tool Apps".
Optional: If you need Stock ROM ASUS Zenfone (All Models), you may get it within the "Download Stock ROM ASUS Zenfone (All Models)" publish and to get RAW Firmware for ASUS Zenfone, you could get it inside the post "Download RAW ASUS Firmware (All Models) ". And also you could get ASUS Flash Tool for Flashing Firmware functions in the put up "Download ASUS Flash Tool (All Versions)". Hope it will let you.
Well, I assume you understand what I said before, now you can follow step by step below to unlock Bootloader your ASUS Zenfone 5z ZS620KL.
  • Charge your ASUS Zenfone 5z ZS620KL, as a minimum 70% or greater.
  • Backup your data, unlocking Bootloader will delete your mobile data, so it is recommended to backup data.
  • Allow installation of applications from unknown resources, even though the authentic "Unlock Device Tool Apps" utility comes from ASUS.com, but all Androids will block packages from other parties who need to put in the APK utility except from the Play Store. The solution is to open the "Unknown Sources" characteristic in the "Settings" -> "Security" -> Device Administration.
How to Unlock Bootloader ASUS Zenfone 5z ZS620KL Android Devices Using Unlock Device Tool Apps
Unknown Sources

  • Download the APK record application within the submit "Download ASUS Zenfone 5z ZS620KL Unlock Device Tool Apps". Not all of those applications are with APK extensions, however there also are ZIP compresses. If you find a ZIP file, make certain you do UNZIP.
  • After you get the APK document in query, now insert the document into your ASUS Zenfone 5z ZS620KL tool, by way of connecting your cellular telephone with a computer the use of a USB cable, placed the APK record to your ASUS Zenfone 5z ZS620KL garage.
How to Unlock Bootloader ASUS Zenfone 5z ZS620KL Android Devices Using Unlock Device Tool Apps
ASUS Zenfone 5z ZS620KL Unlock Apps

  • Now is the time to put in the "Unlock Device Tool Apps" application for your ASUS Zenfone 5z ZS620KL device, by tapping it twice. After you tap it, you will see a warning message about unlocking Bootloader, check the approval box at the bottom.
How to Unlock Bootloader ASUS Zenfone 5z ZS620KL Android Devices Using Unlock Device Tool Apps

  • Now, press the liberate button "PRESS TO UNLOCK YOUR DEVICE".
How to Unlock Bootloader ASUS Zenfone 5z ZS620KL Android Devices Using Unlock Device Tool Apps

  • After you run the "ASUS Unlock Tool" application for your ASUS Zenfone 5z ZS620KL, your cell will restart. This does no longer take too lengthy from the standard boot cycle. Your mobile phone may not experience distinct, but relaxation assured, it is no longer the same device five minutes ago. You will see a short warning when the cellphone boots so that you understand that it can not take a look at the damaged document due to the fact the bootloader isn't always locked. That way you are geared up to discover the crazy global of custom ROMs, kernels, and recovery!

Source: //edgeup.asus.com/2017/zenfone-bootloader-release-manual/

How to Unlock Bootloader ASUS Zenfone 4 Max ZC520KL Using Unlock Tool Apps Latest Update

How to Unlock Bootloader ASUS Zenfone 4 Max ZC520KL Using Unlock Tool Apps


Bootloader is a program that loads whilst your ASUS Zenfone 4 Max ZC520KL boots and tests to make certain everything is as it must be. More in particular, the bootloader is searching out any unofficial software that the manufacturer or your provider hasn’t signed off on.
Bootloader is a very important a part of your ASUS Zenfone 4 Max ZC520KL safety. That's what stops unapproved and potentially risky 1/3-birthday party software program from doing real damage. This additionally stops you from doing all sorts of a laugh matters, like rooting to install advert blockers, or flash unique ROMs.
Obviously, unlock Bootloader is an attempt to risk the security of your ASUS Zenfone 4 Max ZC520KL, but, if you are ready to take all the risks that will occur, that is your right. I am here just telling you how to unlock Bootloader ASUS Zenfone 4 Max ZC520KL using the official application from ASUS.com called "Unlock Device Tool Apps".
Optional: If you need Stock ROM ASUS Zenfone (All Models), you can get it within the "Download Stock ROM ASUS Zenfone (All Models)" post and to get RAW Firmware for ASUS Zenfone, you can get it inside the put up "Download RAW ASUS Firmware (All Models) ". And additionally you could get ASUS Flash Tool for Flashing Firmware purposes in the put up "Download ASUS Flash Tool (All Versions)". Hope it allow you to.
Well, I assume you understand what I said before, now you can follow step by step below to unlock Bootloader your ASUS Zenfone 4 Max ZC520KL.
  • Charge your ASUS Zenfone 4 Max ZC520KL, at least 70% or extra.
  • Backup your data, unlocking Bootloader will delete your mobile data, so it is recommended to backup data.
  • Allow set up of programs from unknown sources, even though the authentic "Unlock Device Tool Apps" application comes from ASUS.com, however all Androids will block packages from different parties who want to put in the APK software except from the Play Store. The answer is to open the "Unknown Sources" characteristic in the "Settings" -> "Security" -> Device Administration.
How to Unlock Bootloader ASUS Zenfone 4 Max ZC520KL Android Devices Using Unlock Device Tool Apps
Unknown Sources

  • Download the APK report software within the publish "Download ASUS Zenfone 4 Max ZC520KL Unlock Device Tool Apps". Not all of those applications are with APK extensions, but there also are ZIP compresses. If you discover a ZIP report, make certain you do UNZIP.
  • After you get the APK file in question, now insert the file into your ASUS Zenfone 4 Max ZC520KL tool, with the aid of connecting your cellphone with a computer using a USB cable, put the APK document for your ASUS Zenfone 4 Max ZC520KL storage.
How to Unlock Bootloader ASUS Zenfone 4 Max ZC520KL Android Devices Using Unlock Device Tool Apps
ASUS Zenfone 4 Max ZC520KL Unlock Apps

  • Now is the time to put in the "Unlock Device Tool Apps" utility to your ASUS Zenfone 4 Max ZC520KL device, by tapping it twice. After you tap it, you will see a warning message about unlocking Bootloader, check the approval box at the bottom.
How to Unlock Bootloader ASUS Zenfone 4 Max ZC520KL Android Devices Using Unlock Device Tool Apps

  • Now, press the free up button "PRESS TO UNLOCK YOUR DEVICE".
How to Unlock Bootloader ASUS Zenfone 4 Max ZC520KL Android Devices Using Unlock Device Tool Apps

  • After you run the "ASUS Unlock Tool" utility to your ASUS Zenfone 4 Max ZC520KL, your mobile will restart. This does no longer take too lengthy from the standard boot cycle. Your cellphone might not feel different, however relaxation confident, it is not the same device five mins in the past. You will see a brief caution whilst the phone boots so that you recognize that it can not check the broken record because the bootloader is not locked. That manner you're prepared to explore the loopy international of custom ROMs, kernels, and recovery!

Source: //edgeup.asus.com/2017/zenfone-bootloader-release-manual/

How to Unlock Bootloader ASUS Zenfone 4 Selfie Pro ZD552KL Using Unlock Tool Apps Latest Update

How to Unlock Bootloader ASUS Zenfone 4 Selfie Pro ZD552KL Using Unlock Tool Apps


Bootloader is a software that masses when your ASUS Zenfone 4 Selfie Pro ZD552KL boots and exams to make certain the entirety is because it need to be. More mainly, the bootloader is looking for any unofficial software that the manufacturer or your service hasn’t signed off on.
Bootloader is a very critical a part of your ASUS Zenfone 4 Selfie Pro ZD552KL security. That's what stops unapproved and doubtlessly risky 1/3-birthday party software program from doing actual damage. This also stops you from doing all sorts of amusing things, like rooting to install ad blockers, or flash unique ROMs.
Obviously, unlock Bootloader is an attempt to risk the security of your ASUS Zenfone 4 Selfie Pro ZD552KL, but, if you are ready to take all the risks that will occur, that is your right. I am here just telling you how to unlock Bootloader ASUS Zenfone 4 Selfie Pro ZD552KL using the official application from ASUS.com called "Unlock Device Tool Apps".
Optional: If you want Stock ROM ASUS Zenfone (All Models), you could get it in the "Download Stock ROM ASUS Zenfone (All Models)" put up and to get RAW Firmware for ASUS Zenfone, you could get it within the submit "Download RAW ASUS Firmware (All Models) ". And also you may get ASUS Flash Tool for Flashing Firmware functions in the submit "Download ASUS Flash Tool (All Versions)". Hope it will let you.
Well, I assume you understand what I said before, now you can follow step by step below to unlock Bootloader your ASUS Zenfone 4 Selfie Pro ZD552KL.
  • Charge your ASUS Zenfone 4 Selfie Pro ZD552KL, as a minimum 70% or greater.
  • Backup your data, unlocking Bootloader will delete your mobile data, so it is recommended to backup data.
  • Allow set up of programs from unknown sources, despite the fact that the respectable "Unlock Device Tool Apps" application comes from ASUS.com, but all Androids will block programs from different events who need to install the APK software besides from the Play Store. The answer is to open the "Unknown Sources" feature inside the "Settings" -> "Security" -> Device Administration.
How to Unlock Bootloader ASUS Zenfone 4 Selfie Pro ZD552KL Android Devices Using Unlock Device Tool Apps
Unknown Sources

  • Download the APK report utility within the submit "Download ASUS Zenfone 4 Selfie Pro ZD552KL Unlock Device Tool Apps". Not all of these packages are with APK extensions, but there also are ZIP compresses. If you find a ZIP file, ensure you do UNZIP.
  • After you get the APK document in query, now insert the report into your ASUS Zenfone 4 Selfie Pro ZD552KL device, via connecting your cellular phone with a pc the usage of a USB cable, put the APK document in your ASUS Zenfone 4 Selfie Pro ZD552KL storage.
How to Unlock Bootloader ASUS Zenfone 4 Selfie Pro ZD552KL Android Devices Using Unlock Device Tool Apps
ASUS Zenfone 4 Selfie Pro ZD552KL Unlock Apps

  • Now is the time to install the "Unlock Device Tool Apps" utility for your ASUS Zenfone 4 Selfie Pro ZD552KL device, by tapping it twice. After you tap it, you will see a warning message about unlocking Bootloader, check the approval box at the bottom.
How to Unlock Bootloader ASUS Zenfone 4 Selfie Pro ZD552KL Android Devices Using Unlock Device Tool Apps

  • Now, press the free up button "PRESS TO UNLOCK YOUR DEVICE".
How to Unlock Bootloader ASUS Zenfone 4 Selfie Pro ZD552KL Android Devices Using Unlock Device Tool Apps

  • After you run the "ASUS Unlock Tool" utility for your ASUS Zenfone 4 Selfie Pro ZD552KL, your cell will restart. This does not take too long from the usual boot cycle. Your mobile phone may not experience one of a kind, however relaxation confident, it's now not the same tool five minutes ago. You will see a quick warning whilst the smartphone boots so you recognise that it can't take a look at the damaged record because the bootloader isn't always locked. That means you are prepared to discover the loopy world of custom ROMs, kernels, and recovery!

Source: //edgeup.asus.com/2017/zenfone-bootloader-free up-manual/

How to Unlock Bootloader ASUS Zenfone 4 Pro ZS551KL Using Unlock Tool Apps Latest Update

How to Unlock Bootloader ASUS Zenfone 4 Pro ZS551KL Using Unlock Tool Apps


Bootloader is a application that hundreds while your ASUS Zenfone 4 Pro ZS551KL boots and checks to make sure the whole lot is because it must be. More mainly, the bootloader is looking for any unofficial software that the producer or your service hasn’t signed off on.
Bootloader is a totally vital part of your ASUS Zenfone 4 Pro ZS551KL security. That's what stops unapproved and doubtlessly risky 1/3-celebration software program from doing actual damage. This additionally stops you from doing all sorts of a laugh matters, like rooting to put in advert blockers, or flash special ROMs.
Obviously, unlock Bootloader is an attempt to risk the security of your ASUS Zenfone 4 Pro ZS551KL, but, if you are ready to take all the risks that will occur, that is your right. I am here just telling you how to unlock Bootloader ASUS Zenfone 4 Pro ZS551KL using the official application from ASUS.com referred to as "Unlock Device Tool Apps".
Optional: If you need Stock ROM ASUS Zenfone (All Models), you may get it in the "Download Stock ROM ASUS Zenfone (All Models)" put up and to get RAW Firmware for ASUS Zenfone, you can get it inside the post "Download RAW ASUS Firmware (All Models) ". And additionally you may get ASUS Flash Tool for Flashing Firmware functions inside the put up "Download ASUS Flash Tool (All Versions)". Hope it allow you to.
Well, I assume you understand what I said before, now you can follow step by step below to unlock Bootloader your ASUS Zenfone 4 Pro ZS551KL.
  • Charge your ASUS Zenfone 4 Pro ZS551KL, at the least 70% or greater.
  • Backup your data, unlocking Bootloader will delete your mobile data, so it is recommended to backup data.
  • Allow set up of packages from unknown resources, despite the fact that the legit "Unlock Device Tool Apps" software comes from ASUS.com, however all Androids will block programs from other parties who want to install the APK utility besides from the Play Store. The answer is to open the "Unknown Sources" characteristic inside the "Settings" -> "Security" -> Device Administration.
How to Unlock Bootloader ASUS Zenfone 4 Pro ZS551KL Android Devices Using Unlock Device Tool Apps
Unknown Sources

  • Download the APK file utility in the put up "Download ASUS Zenfone 4 Pro ZS551KL Unlock Device Tool Apps". Not all of these packages are with APK extensions, however there also are ZIP compresses. If you discover a ZIP record, make certain you do UNZIP.
  • After you get the APK document in query, now insert the record into your ASUS Zenfone 4 Pro ZS551KL device, via connecting your cellular phone with a computer the usage of a USB cable, put the APK record for your ASUS Zenfone 4 Pro ZS551KL storage.
How to Unlock Bootloader ASUS Zenfone 4 Pro ZS551KL Android Devices Using Unlock Device Tool Apps
ASUS Zenfone 4 Pro ZS551KL Unlock Apps

  • Now is the time to install the "Unlock Device Tool Apps" application in your ASUS Zenfone 4 Pro ZS551KL device, by tapping it twice. After you tap it, you will see a warning message about unlocking Bootloader, check the approval box at the bottom.
How to Unlock Bootloader ASUS Zenfone 4 Pro ZS551KL Android Devices Using Unlock Device Tool Apps

  • Now, press the free up button "PRESS TO UNLOCK YOUR DEVICE".
How to Unlock Bootloader ASUS Zenfone 4 Pro ZS551KL Android Devices Using Unlock Device Tool Apps

  • After you run the "ASUS Unlock Tool" application in your ASUS Zenfone 4 Pro ZS551KL, your cell will restart. This does not take too lengthy from the same old boot cycle. Your cellphone may not feel one-of-a-kind, but rest assured, it is not the equal device five minutes ago. You will see a quick warning whilst the telephone boots so that you recognise that it can't test the broken record due to the fact the bootloader isn't always locked. That manner you're equipped to explore the loopy global of custom ROMs, kernels, and recovery!

Source: //edgeup.asus.com/2017/zenfone-bootloader-free up-guide/