yashsingh1/xdaforums huggingface dataset:
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sammessi10:
There are many guides for unlocking bootloader and installing TWRP and there are many misconceptions redarding these.

This is the ultimate guide put together to clear all those.

*Use Mozilla Firefox to get the unlock_bootloader image* Chrome isn't working due to bugs in site

Things you need:

1. ZUK Z2 (Z2131/Z2132) [Obviously]

2. "unlock bootlader.img" from developer.zuk.com

3. Minimal ADB and Fastboot from Here

4. Latest TWRP from Here

5. If you want to root download SuperSU from Here

6. MI Flash Tool from Here

Unlocking bootloader factory resets the device, so backup your files before hand.

Getting the Unlock Image:

This one thing is a big problem to attain for many users.

1. Head to developer.zuk.com (Use Chrome to translate the page)

2. Click Login and use the following details

Username: balraj3priya@gmail.com

Password: zukaccount!

Account doesn't work anymore, but you can easily create an account now.

(Login before heading to unlock page)

3 .Click Unlock at the top.

4. Click NEXT on Step 1.

5. Select Z2 from dropdown list.

6. Type in your Serial Number. (You can find it at Settings > About > Status > Serial Number)

If you have a 6 character serial number, add two zeros at end

If you have a 7 character serial number, add one zero at end

7. Give your email ID (Gmail works too)

8. Accept the conditions and click NEXT.

9. A Dialog Box opens up stating that you will recieve an email with the bootloader image.

10. Check your Inbox and Spam folders.

Unlocking Bootloader:

1. Install Minimal ADB and MI Flash (to ensure you get all drivers)

2. Place the "unlock_bootloader.img" in the fastboot installation folder.

3. Run following commands.

(a) adb devices [Your device should be listed, if not, check drivers]

(b) adb reboot bootloader

(c) fastboot -i 0x2b4c flash unlock unlock_bootloader.img

You should see this:

"target reported max download size of 1610612736 bytes

sending 'unlock' (0 KB)...

OKAY [ 0.037s]

writing 'unlock'...

OKAY [ 0.053s]

finished. total time: 0.090s"

(d) fastboot -i 0x2b4c oem unlock-go

You should see this:

"OKAY [ 0.041s]

finished. total time: 0.041s"

(e) fastboot reboot

4. You should end up with an unlocked bootloader.

Installing TWRP:

1. Place TWRP downloaded from official site in the fastboot installation folder.

2. Run the following commands.

(a) adb reboot bootloader

(b) fastboot -i 0x2b4c flash recovery twrp.img

(c) fastboot reboot

3. You have successfully installed TWRP

Rooting using SuperSU.zip

1. Place the downloaded "SuperSU.zip" into the root folder of phone to. (That would be easy to find while installing)

2. Reboot to TWRP

3. Select Install and locate SuperSU.zip

4. Swipe to flash.

You should end up with a unlocked and rooted Z2.

Comment for flaws or if you want me to add more info at a specific step.

Note:

If you get a message saying "Daemon started succesfully" re-run the previous command.

TWRP Links:

TWRP 3.1.0

TWRP 3.1.1

TWRP 3.2.1

Thanks to Balraj at zukfans.eu for Login Details

Goodluck Unlocking :good:

Hit thanks if this helped you.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] AkumDX:
And finally a guide for newbies like me :D btw is there any tool to unlock bootloader and flash ROMs like other devices?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sammessi10:
Happy that this helped you. I don't​ think there is any tool for unlocking and flashing (I think you are refering to ODIN for Samsung). But you can use QPST or MI Flash to flash Stock ROMs.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] MacGyverLarisa:
i stuck in second step

2. Place the "unlock_bootloader.img" in the fastboot installation folder.?????

where is this location

please help me

i can go in adb mode but i cant find the location

I FIND IT i am soo nood
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] zakaria12:
[IMG="https://s22.postimg.org/715wt8p35/Capture.png"]https://s22.postimg.org/715wt8p35/Capture.png[/IMG]

i cant unlock bootloader :crying: :crying:

---------- Post added 4th June 2017 at 12:33 AM ---------- Previous post was 3rd June 2017 at 11:54 PM ----------

fix it :D
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sammessi10:
Generally it is Program Files or Program Files (x86) > Minimal ADB and Fastboot
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sammessi10:
Did you fix it? If not check if you have given your serial number correctly on unlock request page. You need the device specific image
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] MacGyverLarisa:
Thank you for your response

After a little thought

I Put it inside the folder that I start to adb mode and it works perfectly
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] coolsid8:
Is it possible to regain warranty after locking bootloader or is the warranty lost ?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] akash.mahadeshwar:
Hi is it possible for any one to upload the TWRP.img file ?

I tried it with the one which is in twrp (twrp-3.1.1-0-z2_plus) app however its not working.

It showed flash completed however its still loading old recovery.

i'm currently on android 7 with boot loader unlocked.

Thanks
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] aditya1999:
how did you fix that?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] zakaria12:
i just request the bootloader Unlock image again because its was Damaged and i flash it and its work
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sammessi10:
Yeah it is possible to regain warranty. Flash the stock firmware with QPST or Miflash
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sammessi10:
Try to flash 3.1.0 first and then 3.1.1
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] aditya1999:
Thanks I did the same.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] mGforCe:
Thanks for the guide. Pls do add that ZUK Z2 is not recognized as a device in fastboot.

So one must specify the OEM id . The code is "-i 0x2b4c " for Zuk Z2. So any command fastboot must be suffixed with the following code: -i 0x2b4c
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] mity_dev:
My device doesn't gets detected in fastboot mode by my pc. I have tried all drivers of Lenovo and other manufacturers drivers but it can't detect my device in fastboot mode. But it detects the phone in adb and gets booted to fastboot mode and when i run the command fastboot -i 0x2b4c flash unlock unlock_bootloader.img.

It shows waiting for device . Please Help anyone!.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] ast9011:
Same with me.. i think it's beacause of nougat as this method is working fine with marshmallow.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] xtra sharif:
Bro I have some questions

1st does Z2 (Z2131) custom ROM could be flashed on Z2 Plus(Z2132)?

2nd of yes then what is brushed ROM
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sammessi10:
1. Yeah... Both the ROMs are interchangeable.

2. I never heard of it but if you are talking about Bshuy ROM, then it's a bloatfree stock ROM.

PS: Please don't quote the whole OP
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Raja dawn:
When i type adb reboot bootloader. It shows no devices/ emulators found. Need help
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] 2VJ5:
Download the Miflash tool from the OP
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sandruman:
Install driver and change USB port

Inviato dal mio Z2 Plus utilizzando Tapatalk
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Raja dawn:
Already installed it.. but then what should i do?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] One of developers:
Re install the drivers and change your USB port do not forget to turn on Android debugging in developer options
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Raja dawn:
Which drivers should i install?

What I need to do after installing mi flash tool.

Tell me step by step
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] One of developers:
Install minimal adb and fastboot drivers

Install zuk drivers

Turn on usb debugging in developer options

Connect your device to pc

Now try using adb commands
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] 2VJ5:
USB Debuging should be on, in developer settings
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] unloadedluck:
need help, every time when I try to register for a lenovo account, I just end up downloading a courrupted file when I click the register now button
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] unloadedluck:
Can anyone let me borrow a lenovo account to retrieve my bootloader code? I have tried countless times to create an account but it doesn't work. I just keep downloading a 0 byte file when named "emailregister" when I click register now on the page
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] raman.hwr:
Use this https://passport.lenovo.com/wauthen/login to create lenovo id first then try and do the process of applying for unlock image

The link given in OP that you are trying wont signup i too tried many times
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] eoinzy:
How long does it take to get the email with the boot unlock image?

And do I choose "Lenovo" or "ZUK"?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Vi7eta:
Need urgent help

Unlocked bootloader flashed twrp then tried flashing magisk through 19.1 through twrp but it gave error 1

Then i tried to update twrp it said cpmpleted but after that it did not boot. Either it Stuck on zuk logo or it can be boot into bootloader. Pc isnt recognising the phone no more.

[MENTION=6534137]sammessi10[/MENTION] please look into this.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sanjay.2704:
Try older version of twrp like 16.1 or 17.1
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Diegolvr:
When i try to get this:

"unlock bootlader.img" from developer.zuk.com

After put serial number, e-mail and click to next step, the page reload and get shop.lenovo.com

and... the bootloader.img never comes for the e-mail, i try create another account without gmail, i try chrome, firefox and ie and i get the same "error"
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] 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) go to lineageos.org and look for the decive and go to install instructions.

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

Further Info and possible requirements

You may have to be on ZUI 3.5 (Chinese Version) - It may not work with the Indian Version.

Follow this hints to deep flash ZUI Chinese Stock firmware: https://xdaforums.com/showpost.php?p=83808887&postcount=2

Also read this:

https://xdaforums.com/showpost.php?p=80890653&postcount=40
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] ajnightshade:
Hi!

I have received the unlock img from zuk. However, I get an invalid data message.

C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot -i 0x2b4c flash unlock sn.img

target reported max download size of 1610612736 bytes

sending 'unlock' (5 KB)...

OKAY [ 0.032s]

writing 'unlock'...

FAILED (remote: Invalid data)

finished. total time: 0.096s

What am I missing?

Note: I received only sn.img and not unlock_bootloader.img from the devs
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] ajnightshade:
Found the solution. Answering in case if someone is still looking for a solution.

Apparently, if we translate the site from Chinese to English, selection of Zuk does not happen even though it says so on the screen. Leave the site as is (in Chinese) and select Zuk and enter the details.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] mmcrjx:
My zuk z2 plus is stuck at this screen. How do I get out from here?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Walk80:
Thanks... still work perfectly (I just tried 30min ago in my old z2 "z2131")

To get the Unlock Image, link update:

https://www.zui.com/iunlock (No need account register)

step 1: Click on link and select ZUK (on the left side menu)

step 2: Put your phone informations and accept terms

OBS: page is in Chinese, but if you can't translate these are the requested data:

IMEI number (call *#06# to know your IMEI, get the first one)

Serial number (of your phone)

E-MAIL (I used my @gmail)

Verification code (just repeat the number on the right side)

[check the box to accept terms]

[click in the blue button]

step 3: After receave the email, download de img file and follow the rest of the tutorial page...
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] XMarty SAgarr:
Plz help it's showing

Error: cannot load 'unlock_bootloader.img'
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] xtra sharif:
Thanks for your help next time I will do as you said?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sammessi10:
Try this guide

Click Here
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] abulhasan:
Zuk developer site has no option for login

It is already sign in.

How to log in pls explain.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] glasseffects:
Malfunctioning site?

Hi, I'm recieving "Bad Gateway" the moment I click Next after accepting all conditions and entering the serial number.

Is there any alternate?

Thanks.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sergsinger:
For all that who wants to unlock a bootloader!

Administration of site (http://developer.zuk.com/bootloader) has responded to me that they faced with DNS problem and are trying to fix it.

You need to write a message with serial number of your phone to get bootloader unlock file.

Example of a message:

To: devworld@zuk.com

Topic: Bootloader unlock

Message: Hello. Please, provide me with bootloader unlock image. My phone is Z2 and serial number is ********. Thanks in advance, (your name).

P.S. Press that button on the site to write a message:
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] glasseffects:
Thanks Sergsinger!
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] mGforCe:
I had same issue today... Use different browsers... Chrome gave me bad gateway error. FIrefox worked fine.

Use different browser.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sammessi10:
Thanks bro. Will update the OP
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sergsinger:
You don't need to do this, because administration of ZUK-site noticed me with "site is now functioning as usual" :)
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Yuvraj1608:
Can i relock bootloader after unlocking it

How to relock bootloader of z2 plus
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sergsinger:
Yes, flash older firmware (than flashed before). E.g. you was on 133 and flashed 093, so your bootloader will be locked.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] matesurano:
Actually there is a difference between locked and Relocked. With all the official (QPST/QFIL firmware) your bootloader will be relocked but you will not get OTA updates. But only the first official chinese firmware 1.9.044_ST will give you a actually Locked bootloader and you will be able to do official OTA updates. Hope this helps.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] kumar akarsh:
i get <waiting for any device> after fastboot -i 0x2b4c flash unlock unlock_bootloader.img this command. and it just pauses there. what to do??
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Shankar B:
Ok so I have tried to get the unlock bootloader image like a hundred times, and whenever i try to flash it through command prompt this happens. I read that a few people resent the request for the image, got a new image and it got fixed. But this error is still persisting for me. I have installed all the relevant drivers as i had a oneplus 2 before, even then it's not working. Please help me out someone.

fastboot -i 0x2b4c flash unlock unlock_bootloader.img

target reported max download size of 1610612736 bytes

sending 'unlock' (0 KB)...

OKAY [ 0.030s]

writing 'unlock'...

FAILED (remote: unlock failed)

finished. total time: 0.062s
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Shankar B:
edit: I finally succeeded on the million and onth time. thanks for the guide :)
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Rangetsu:
Just a clarification. I'm on 2.5.104ST.. will this method work? And after reading the posts, I believe that OTA updates wont work ?

If this method won't work for my version, what other options do i have to unlock the bootloader and to root the phone.

And to flash it to a different stock from, I need to unlock the bootloader right .. so any advice would be nice :o
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sergsinger:
Sure, it will work. OTA will not work.

If your are going to use custom ROM, yes, you need to unlock bootloader, install TWRP and flash ROM.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] kirant.405:
Could not boot to twrp

I've unlocked my device and tried to install twrp. But I am not able to boot to twrp.

please help.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sergsinger:
Press Volume + or - while you see on screen info message about unlocked bootloader.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] rutwij_chavan:
Unlock bootloader and flash custom rom

is it ok flash a custom rom after Z2 plus nogout update or it should flash with marshmallow ?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sergsinger:
For MIUI and Flyme you need to be on OS 6.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] jumbobombo:
Waiting for device error. Maybe need proper drivers

Hey,

I get stock on fastboot -i 0x2b4c flash unlock unlock_bootloader.img command

the cmd is stuck on "waiting for device"

I think I have the correct drivers since the phone is being detected by the adb devices command.

My z2 plus is on android 7. ZUI 2.5 Indian Version

Please help
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] jumbobombo:
Okay I solved it.

The problem was with the drivers. After installing various drivers, suddenly it worked. :D

Thanks anyways :p
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] umeshkumar1995:
thanks

thank you for this guide
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sammessi10:
Hit the thanks button... It's more easy and better than quoting a whole post. :good:
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] abhimanyu.singh:
Hey guys can anyone confirm if unlocking will delete everything from internal storage like photos and all?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sergsinger:
Read the whole post before posting.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] abhimanyu.singh:
Thanks a lot man. And yes I did read OP but wanted to reconfirm so asked.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sammessi10:
I wrote the goddam post to reconfirm... :rolleyes:

BTW... If you're wondering, I think the data is erased for protection of you're data upon theft of you're phone..
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] vladovns:
Hi all, does anybody know if you have to be on the official ZUI firmware to unlock the bootloader or it will work with the vendors international rom.

Thanks
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sergsinger:
It doesn't matter.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] arch_geek:
Thank you for the detailed guide! Bootloader unlocked and recovery flashed successfully!
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] brother_muzonne:
I'm having the same problem. Any luck so far?

---------- Post added at 05:24 PM ---------- Previous post was at 05:19 PM ----------

How?... I'm stuck on ZUI with unlocked bootloader. PC displays recovery flashed successfully but when I boot phone into recovery it always boots to default recovery instead of twrp
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] arch_geek:
You need to reboot to fastboot again.

Then download the latest TWRP recovery from the link below:

https://dl.twrp.me/z2_plus/twrp-3.1.1-0-z2_plus.img

Copy it to the folder where adb.exe and fastboot.exe are located and rename it to twrp.img

Then use this command:

.\fastboot -i 0x2b4c flash recovery twrp.img

Then use this command to reboot:

.\fastboot reboot

You should be good to go.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] brother_muzonne:
I did all that . Still, the phone boots into stock recovery
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sammessi10:
Try an earlier version if TWRP. Maybe 3.1.0. It should work, then flash the latest one.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] brother_muzonne:
It did work. Thanks a lot. Now how do i flash the latest twrp version. The same way via adb?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sammessi10:
Yeah... The same way.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sergsinger:
You can do it now via TWRP. Just put twrp.img to the phone, press "Install", press "Choose .img".
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] brother_muzonne:
Thanks a lot guys. I'm a newbie.

---------- Post added at 10:26 PM ---------- Previous post was at 10:25 PM ----------

And the latest latest AICP is just awesome
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] n00b_dr0id:
A tip for future guides:

Place this line at the top in bold: Unlocking bootloader factory resets the device, so backup your files before hand.

Not after.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] nitbhu10:
Happened same thing with me.

First flash twrp version 3.1.0 and again flash 3.1.1.

It worked for me.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] kanewilliam:
Successfully unlocked z2plus but could not flash TWRP

Guys successfully unlocked the bootloader but could not flash twrp . Please guide me guys . I have attached the screenshot of the error i am getting .

Thanks
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] mGforCe:
This is because you are using wrong command to flash twrp. Pls use as below

fastboot -i 0x2b4c flash recovery filename.img

Replace filename.img with full fine name of recovery img file
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] kanewilliam:
Thanks man. It worked like a charm . Thanks ,Thanks........................
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] kanewilliam:
Now another new problem after installing super user through twrp not its not recognizing the sim cards. There is no network and if I dial *#06# only one IMEI is seen and another one is not shown. Please help me thanks.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sunnythehoney:
problem is not with super user it might be with twrp, flash twrp and give it permission to make changes in recovery mode corrupt or change the partitions, in future if u again flash twrp make sure make it read only. for imei problem search on forum or visit http://xdaforums.com/lenovo-zuk-z2/how-to/guide-restore-lost-imeis-repair-network-t3635734 or other such thread.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] kanewilliam:
Alright i have flashed another super user now i am getting the full signal . Thanks for your support guys.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sammessi10:
Post updated. Thanks
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] kanewilliam:
Yes, that is true it resets the phone after unlocking the bootloader .
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] n00b_dr0id:
Already wiped out all my data, this is why I prefer external sd cards.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] enter.hk:
Guys I m on my way to unlock the bootloader ...

The unlock image size I recieved in my mail is 521 bytes is that ok.. ???