Unlocking bootloader zui device only!

[xperia_bird]

I have found a way to unlock bootloader again! (if the normal fastboot command does not work for you!)

I had mine bootloader re-locked for some stupid reason. And my phone stayed at Lenovo logo, So no booting or flashing custom roms again. I had giving up the hope. But after searching on some Chinese website. I found a way and it WORKED! I have now again a unlocked bootloader.

The website is in Chinese but don't worry people you just need to fill in some small data.

1: go to the website : https://www.zui.com/iunlock

fill box 1 your IMEI 1
fill box 2 your SERIAL key (the key that you get when you connect to fastboot and use the command 'Fastboot Devices')
fill box 3 your email
fill box 4 the security code that you see to the right of it ( Four numbers )

check the last box, as accepting the rules for warranty blabla. And click the BLUE BIG button

Now wait and have patience! After a while you will get a email with a file in it. Download that file and put it in your adb folder.

now check your device first if its connected and that you see the serial.
- > Fastboot devices <-

If YES than continue...

Use the command :
Fastboot flash unlock (name_of_the_file).img

after that use command:
fastboot oem unlock-go

And your bootloader is UNLOCKED AGAIN !!! :highfive::good::laugh:

Phone is back to life

Disclaimer: sharing your imei is not safe, other people can easily duplicate it on other phones. Google: ''why you shouldn't share your imei''.
Use this as your last resort if your phone doesn't boot or is bricked. Use a fake imei, follow the process and once or phone is unlocked, update the imei using the link @sth0r created on xda to fix imei for the lenovo z5

 

[karanzxhao]

I have found a way to unlock bootloader again! (if the normal fastboot command does not work for you!)

I had mine bootloader re-locked for some stupid reason. And my phone stayed at Lenovo logo, So no booting or flashing custom roms again. I had giving up the hope. But after searching on some Chinese website. I found a way and it WORKED! I have now again a unlocked bootloader.

The website is in Chinese but don't worry people you just need to fill in some small data.

1: go to the website : https://www.zui.com/iunlock

fill box 1 your IMEI 1
fill box 2 your SERIAL key (the key that you get when you connect to fastboot and use the command 'Fastboot Devices')
fill box 3 your email
fill box 4 the security code that you see to the right of it ( Four numbers )

check the last box, as accepting the rules for warranty blabla. And click the BLUE BIG button

Now wait and have patience! After a while you will get a email with a file in it. Download that file and put it in your adb folder.

now check your device first if its connected and that you see the serial.
- > Fastboot devices <-

If YES than continue...

Use the command :
Fastboot flash unlock (name_of_the_file).img

after that use command:
fastboot oem unlock-go

And your bootloader is UNLOCKED AGAIN !!! :highfive::good::laugh:

Phone is back to life

Disclaimer: sharing your imei is not safe, other people can easily duplicate it on other phones. Google: ''why you shouldn't share your imei''.
Use this as your last resort if your phone doesn't boot or is bricked. Use a fake imei, follow the process and once or phone is unlocked, update the imei using the link @sth0r created on xda to fix imei for the lenovo z5

hi i tried to follow this guide to unlock bootloader but on the lenovo website it is asking for an 8 digit serial number but my lenovo z5 only has 7 digit serial number can you please help

 

[Techstro]

hi i tried to follow this guide to unlock bootloader but on the lenovo website it is asking for an 8 digits but my lenovo z5 only has 7 digits

In this case the fastboot command is wrong.
You want to boot the phone up to the landing screen and enter ADB devices in your command prompt. Enter That.
You can also get the correct serial by opening the dialer app and entering *#06# in your touch phone pop-up keypad

Hope that helps!

 

[Kenak]

This was helpful, It worked for me. Thanks.

 

[a9REhdDp5V]

Guide outdated - this worked for me now

Phone: ZUK Z2 Plus (Z2131)

After having tried many times following this tutorial and never receiving any E-Mail, I found a rather simple solution that worked:
I didn't really expect it to work, so this is from memory, wordings may differ a bit.

First: make backup of your data!

• Make sure you have updated ZUI to the latest available version.
• Enable developer options ( From your device go to " About -> ZUI version" , scroll down and click " build number " continuously until you see "You are now a developer")
• Go to developer Options and look for the toggle "Allow OEM Unlock" (or similar) and set it to enable. Confirm.
• Reboot.

The phone automatically performs a factory reset (All Data lost!).

Now you can continue with flashing custom recovery (TWRP) and ROM.
For example use Lineage OS. Instructions: (Sorry, can't post the link)

Finally I can enjoy the phone with custom ROM and up-to-date Android 10.