BootLoader Unlock (both ZE551ML and ZE550ML)

Status
Not open for further replies.
Search This thread

ravian29

Senior Member
Jan 23, 2011
1,849
1,872
Does it matter?
Congrats to all ( both ZE551ML and ZE550ML users), bootloader has been unlocked without connecting to ASUS servers.

2.19.40.20 is also unlockable
New update 2.19.40.20 can be unlocked as well and Asus did not patch the hole. Thanks to @oxydius7 for confirming this here

Bootloader of both ZE550ML and ZE550ML can be unlock if rom is on 2.19.40 or 2.19.40.20

Lets discuss, problems and unlocking related experience here.

How to unlock bootloader:

1. Update to 2.19.40.18 or 2.19.40.20
2. root it
3. make sure adb is insatlled and working
4. enter the following commands in cmd

adb shell (press enter)
su (press enter)
getprop ro.isn > /factory/asuskey ( press enter)
reboot bootloader ( press enter )

Phone will restart in bootloader and after updating itself phone will restart again and ASUS splash screen will be white ( locked bootloader has black screen, you will see difference by yourself)

5. download black splash screen for 551 from here

https://mega.co.nz/#!IlMGiZ7I!kepXRFda7cgNPWHQovkCZaMaD2zVF4UufAJT6YEDU3k

or for 550 from here
http://forum.xda-developers.com/attachment.php?attachmentid=3376376&d=1435127302

6. navigate to adb folder open cmd and type the following commands

adb reboot bootloader (press enter)
fastboot devices (press enter)

see if device is listed, write following

fastboot flash splashscreen splashscreen.img (press enter)

restart your phone and now black splash screen is back. Congrats your bootloader is now unlocked.
If you follow my steps there would not be any data loss from internal memory and sd card, but i will advice to take a backup in case if you are out of luck

ZE551ML OTA 2.19.40 OTA Download:

http://fota.asus.com/delta_package/...W_Z00A-20150612/WW_551_0529_0612_20150612.zip
you guys can side-load or flash in via recovery method
Thanks to @fuzzybuffalo for providing the link

Download ZE550ML 2.19.40.12 complete Rom:

Download Here
Changelogs
credit goes to @keepfishes for coming up with links on post

Download ZE550ML 2.19.40.12 OTA Rom:
Download Here
credit goes to @singhnsk for coming up with links on post

Tip:

if you have problems with adb try to install "Terminal Emulator" app and running the commands from there

su
getprop ro.isn > /factory/asuskey
reboot bootloader
Thanks to @hugoprh for providing the tip, thank to him on his post

white splash screen for 551
Download
credit goes to @fuzzybuffalo for providing the link, thank to him on his post

Twrp Flashable, Black and white splash screens for 551
If you want twrp flashable zips of both white and black splash screens of 551, please download them from here


I will not take any responsibility, its your device and your will to try this
All credits goes to @shakalaca for providing unlock
donate and say thanks to him, press thanks button if i helped
 
Last edited:

Christopher876

Senior Member
May 24, 2015
223
65
West Palm Beach
I dont belive so, the needed files are part of the 2.19 update. I also had a problem with the update so I had to reset phone, then sideload a full copy of 2.18 and then sideload 2.19 and reroot phone.

Alright, I will try this right now and see if it updates, thank you for responding. This is the only phone that I have been having problems consistently with. It is kind of making me feel like I should of went the extra money and buy a device from LG or Sony.
 

ravian29

Senior Member
Jan 23, 2011
1,849
1,872
Does it matter?
Alright, I will try this right now and see if it updates, thank you for responding. This is the only phone that I have been having problems consistently with. It is kind of making me feel like I should of went the extra money and buy a device from LG or Sony.
same here i always bought samsung since s2, i can understand how this phone messes and waste a lot of timw with small things which can be done in seconds
 
  • Like
Reactions: mongonexus

SpaZzzzz

Senior Member
Feb 19, 2011
55
4
thank you very much to all of the developers who helped unlocking the bootloader!

just one question - what does unlocking the bootloader gives me? (sry for noob question)
 

ansebovi

Senior Member
thank you very much to all of the developers who helped unlocking the bootloader!

just one question - what does unlocking the bootloader gives me? (sry for noob question)

can flash custom[dev made] roms,kernel which maybe increase or decrease performance,battery,added features,latest android version etc etc[like CM12..1]
 
  • Like
Reactions: hypertech
Status
Not open for further replies.

Top Liked Posts

  • There are no posts matching your filters.
  • 116
    Congrats to all ( both ZE551ML and ZE550ML users), bootloader has been unlocked without connecting to ASUS servers.

    2.19.40.20 is also unlockable
    New update 2.19.40.20 can be unlocked as well and Asus did not patch the hole. Thanks to @oxydius7 for confirming this here

    Bootloader of both ZE550ML and ZE550ML can be unlock if rom is on 2.19.40 or 2.19.40.20

    Lets discuss, problems and unlocking related experience here.

    How to unlock bootloader:

    1. Update to 2.19.40.18 or 2.19.40.20
    2. root it
    3. make sure adb is insatlled and working
    4. enter the following commands in cmd

    adb shell (press enter)
    su (press enter)
    getprop ro.isn > /factory/asuskey ( press enter)
    reboot bootloader ( press enter )

    Phone will restart in bootloader and after updating itself phone will restart again and ASUS splash screen will be white ( locked bootloader has black screen, you will see difference by yourself)

    5. download black splash screen for 551 from here

    https://mega.co.nz/#!IlMGiZ7I!kepXRFda7cgNPWHQovkCZaMaD2zVF4UufAJT6YEDU3k

    or for 550 from here
    http://forum.xda-developers.com/attachment.php?attachmentid=3376376&d=1435127302

    6. navigate to adb folder open cmd and type the following commands

    adb reboot bootloader (press enter)
    fastboot devices (press enter)

    see if device is listed, write following

    fastboot flash splashscreen splashscreen.img (press enter)

    restart your phone and now black splash screen is back. Congrats your bootloader is now unlocked.
    If you follow my steps there would not be any data loss from internal memory and sd card, but i will advice to take a backup in case if you are out of luck

    ZE551ML OTA 2.19.40 OTA Download:

    http://fota.asus.com/delta_package/...W_Z00A-20150612/WW_551_0529_0612_20150612.zip
    you guys can side-load or flash in via recovery method
    Thanks to @fuzzybuffalo for providing the link

    Download ZE550ML 2.19.40.12 complete Rom:

    Download Here
    Changelogs
    credit goes to @keepfishes for coming up with links on post

    Download ZE550ML 2.19.40.12 OTA Rom:
    Download Here
    credit goes to @singhnsk for coming up with links on post

    Tip:

    if you have problems with adb try to install "Terminal Emulator" app and running the commands from there

    su
    getprop ro.isn > /factory/asuskey
    reboot bootloader
    Thanks to @hugoprh for providing the tip, thank to him on his post

    white splash screen for 551
    Download
    credit goes to @fuzzybuffalo for providing the link, thank to him on his post

    Twrp Flashable, Black and white splash screens for 551
    If you want twrp flashable zips of both white and black splash screens of 551, please download them from here


    I will not take any responsibility, its your device and your will to try this
    All credits goes to @shakalaca for providing unlock
    donate and say thanks to him, press thanks button if i helped
    16
    Thanks too @crpalmer @jrior001 there is basic cm buildable i got @Mazda to extract the blobs because none had been uploaded. This is in no way a DD wifi, ril, bluetooth, sound do not work but it boots and the touchscreen and hardware keys work (only have nav bar because i used the x86 gapps from the nexus player)

    2015_06_29.jpg

    It gives me great displeasure to see this posted by someone other than crpalmer or myself as the the 2 of us have wasted countless hours to get this far, and are committed to getting it proper. I put out a call for assistance and nobody steps up and when I take a break and see what's up here I find this.

    With that said, it is true we do have a CM based ROM booting. It doesn't do much else yet but we'll get there. If anybody would like to help and has some skills let me know here or in
    #zenfone2 on freenode.

    Sent from my N5206 using XDA Free mobile app
    12
    Thanks too @crpalmer @jrior001 there is basic cm buildable i got @Mazda to extract the blobs because none had been uploaded. This is in no way a DD wifi, ril, bluetooth, sound do not work but it boots and the touchscreen and hardware keys work (only have nav bar because i used the x86 gapps from the nexus player)

    2015_06_29.jpg
    9
    Patience

    Just an observation and don't wish to offend anyone.

    In following this entire thread, there are several people who probably should NOT be attempting to alter their devices at their current level of knowledge. I would recommend waiting while studying the progress of more senior members. Further, the methods being discussed here are not "officially" supported by Asus and possibly there will be simpler/supported methods in the future.

    I understand that someone has to pioneer, but there are some who are better equipped to do so. After all, what does unlocking the bootloader accomplish at this time? Until there is a custom recovery and ROM development it does not add any functionality or benefit to the user. (Rooting, on the other hand, does permit freezing bloat and is easily accomplished by any of three methods.)

    I strongly suggest waiting and watching for our less technical friends.

    Just thinking.:eek:
    9
    please share your experience with us all, locking bootloader works on 550 or not so other can follow your steps

    OK, I took the plunge and allow me to be the one to confirm that the bootloader unlock now also works on the ZE550ML by following the OP's instructions! I rather like the white screen too :)