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[TOOL] One-Click bootloader unlock (no root required)

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By sorg, Senior Member on 12th July 2015, 08:47 PM
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I've made simplier way to unlock the bootloader of ZE551ML/ZE550ML.

Update!
Version 2.
Now it's not required to flash/downgrade droidboot.img. But you still need to flash one of compatible ROM.
Currently compatible versions are:
For ZE551ML: v2.19.40.18, v2.19.40.20, v2.19.40.22 and future newer versions unless opposite mentioned.
For ZE550ML: v2.19.40.12, v2.19.40.13, v2.19.40.23 and future newer versions unless opposite mentioned.

For example, you can flash full ROM v2.19.40.22 and then use unlocker v2.

Just unzip everything from attached archive and then start unlock_one_click_v2.bat
If you've enable USB debugging then phone will automatically reboot to bootloader and will unlock the bootloader. If you didn't enable USB debugging, then you need to reboot to bootloader manually (Turn the phone off and disconnect USB, then press Power+VolumeUp keys at the same time and keep it pressed till you see ASUS logo, then you may connect USB cable).
Either way, unlock_one_click_v2.bat will proceed to unlock in fully automated way.
If initial boot splash screen become inverted, then bootloader has been unlocked!

If you don't like white boot screen, then you can flash original black one:
http://forum.xda-developers.com/zenf...flash-t3141945

Originally, it's developed for WW firmware but should work on any region.
Works on CN firmware. Confirmed by @corrsea


Based on unlock method discovered by
@shakalaca
Based on fastboot hack by @social-design-concepts
Attached Files
File Type: zip ZF2_one_click_unlock_by_sorg_v2.zip - [Click for QR Code] (985.8 KB, 142476 views)
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12th July 2015, 11:45 PM |#2  
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Version 1 (old)

To use this version, you need to flash ROM not older than v2.19.40.18 for ZE551ML, and v2.19.40.12 for ZE550ML. And then downgrade (if required) droidboot to compatible droidboot.img
Code:
fastboot flash fastboot droidboot.img
For ZE551ML, known compatible droidboot.img versions are 2.19.40.18, 2.19.40.20.
For ZE550ML, known compatible droidboot.img versions are 2.19.40.12.
Attached Files
File Type: zip ZF2_one_click_unlock_by_sorg.zip - [Click for QR Code] (821.3 KB, 8212 views)
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13th July 2015, 12:05 AM |#3  
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Important note for Stock ROM lovers:
Although, unlocker v2 works with v2.19.40.22, there is no warranty, it will continue to work on future versions. It is up to ASUS decision. Unlocking process still requires several files from /system partition including special version of if.bin (/system/etc/firmware/if.bin). These files are still supplied with v2.19.40.22, but in the future they can be removed by ASUS together with disable of downgrade ability for if.bin.
So, if you will flash future stock ROM through official update procedure (which includes bootloader update - from ifwi.zip) then you may loose unlocked bootloader! And of course, ASUS may completely block unlocking procedure (at least unofficial way).
So, if unlocked bootloader is important for you, then
1) unlock it ASAP while current firmware allows.
2) don't use official updates. You need to remove all lines from update script containing ifwi.zip references and then flash through TWRP (you need to remove lines checking recovery version as well).
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13th July 2015, 12:24 AM |#4  
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thank you very much for making this way easier, hope it will help many people, good job bro
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13th July 2015, 04:33 AM |#5  
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@sorg, thanks for the tool. One ques. Will it wipe off the data? And does it keeps OTA taking ability or will it break off? If it breaks, what can be done to get it back?
13th July 2015, 06:20 AM |#6  
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Quote:
Originally Posted by itskapil

@sorg, thanks for the tool. One ques. Will it wipe off the data? And does it keeps OTA taking ability or will it break off? If it breaks, what can be done to get it back?

you will continue receiving OTA update.

---------- Post added at 05:20 AM ---------- Previous post was at 05:12 AM ----------

Quote:
Originally Posted by sorg

Important note for Stock ROM lovers:
Although, unlocker v2 works with v2.19.40.22, there is no warranty, it will continue to work on future versions. It is up to ASUS decision. Unlocking process still requires several files from /system partition including special version of if.bin (/system/etc/firmware/if.bin). These files are still supplied with v2.19.40.22, but in the future they can be removed by ASUS together with disable of downgrade ability for if.bin.
So, if you will flash future stock ROM through official update procedure (which includes bootloader update - from ifwi.zip) then you may loose unlocked bootloader! And of course, ASUS may completely block unlocking procedure (at least unofficial way).
So, if unlocked bootloader is important for you, then
1) unlock it ASAP while current firmware allows.
2) don't use official updates. You need to remove all lines from update script containing ifwi.zip references and then flash through TWRP (you need to remove lines checking recovery version as well).

Hi
Is there anyway other than installing a third-party recovery to verify if the boot-loader is unlocked or locked ?

will it void warranty of the phone.
13th July 2015, 07:16 AM |#7  
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If you unlock the bootloader it will void the warranty, as there's no way currently to lock the bootloader again.

Quote:

Hi
Is there anyway other than installing a third-party recovery to verify if the boot-loader is unlocked or locked ?

will it void warranty of the phone.

13th July 2015, 04:28 PM |#8  
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Are there news for the ZE500CL version?
14th July 2015, 02:11 AM |#9  
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I currently have .22 via OTA, so I can just proceed with unlocking the bootloader without any issues? because in the other thread, they are still saying there is no way to unlock bootloader without downgrading to .20 or .18.. TIA!
14th July 2015, 07:37 AM |#10  
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Quote:
Originally Posted by jarjarbingie

I currently have .22 via OTA, so I can just proceed with unlocking the bootloader without any issues? because in the other thread, they are still saying there is no way to unlock bootloader without downgrading to .20 or .18.. TIA!

can you read what i've wrote in first post?

Quote:

For example, you can flash full ROM v2.19.40.22 and then use unlocker v2.

14th July 2015, 07:49 AM |#11  
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man, a simple "yes" would have been easier to type and more polite.. of course, I've read it, same with all the threads here.. that's why I've seen a conflicting statement in the bootloader thread, hence the attempt to "clarify".. not everyone here is as good as you are.. thanks anyway..
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