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://xdaforums.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
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://xdaforums.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: