[ROOT][GUIDE][NOOB-FRIENDLY]Unlock Bootloader+Root+Stock Firmware for Lenovo K8 Plus

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Dhruv_Agarwal

Senior Member
Dec 31, 2016
234
168
Moradabad
How to unlock bootloader & get root for Lenovo K8 Plus

**********Pre-requirements***********

1. Make sure you have 70% charge or more then that.
2. Follow all steps correctly otherwise you will end up with a bricked phone.
3. I'm not responsible for any damage to your phone.
4. Make sure that you have installed usb drivers.
5. Download ADB & Fastboot Drivers

Steps to Unlock Bootloader

1. First of all, enable the Developer Option
To Enable the Developer Option, Go to your Settings -> About -> Software Information -> More -> Now Tap on the Build Number 7-8 Times until you see a toast message “Developer option enabled"

2. Go back to settings -> Now you need to enable the OEM Unlock by going to Settings -> Developer Option and Enable OEM Unlock and USB Debugging

3. Download and Extract the Downloaded ADB fastboot Zip file on your phone.

4. Now connect your phone to Computer using USB Cable.
When you connect your Phone to Computer, please wait until all the drivers get installed.

5. In your ADB fastboot folder open a command prompt window by pressing Shift Key + Right Mouse Click
Now type the command in your command window
Code:
adb devices

6. If you see a pop up to allow USB Debugging on your phone, Click OK
Now type the command below to reboot your phone to bootloader
Code:
adb reboot bootloader

7. Once your phone reboot into bootloader, make sure your phone shows the bootloader locked and then type the command below to make sure fastboot drivers are installed properly.
Code:
fastboot devices

8. This command will list the connected devices. If your phones serial number shows up you are good to go and may continue. If the phone is NOT listed this indicates that your drivers are not installed correctly. In order for you to continue, you must fix your drivers so that your phone is listed under fastboot devices.

9. If the phone has been recognized by the command above, proceed to unlock the bootloader with the following command:
Remember that this step will wipe EVERYTHING off the phone. Also you'll loose your warranty!!
Code:
fastboot oem unlock

10. After the above command has finished executing, run the following
Code:
fastboot reboot

The phone will reboot. Wait until the phone has fully booted up into Android.

Root method
Note:- All credits for it goes to @topjohnwu for his amazing magisk
Requirements:-
1. Make sure you are on latest September patch firmware.
2. Download patched_boot.img created from magisk mangaer.

Instructions:-

1. Connect up your phone then type:-
Code:
adb reboot bootloader

2. Copy patched_boot.img in adb folder.
Now type
Code:
fastboot flash boot patched_boot.img

3. Open up you device & install magisk manager from here

Voilla you're rooted.

Stock firmware - here

Now, I'm working on a working TWRP for our device so be patient.

If you want to make help in the development for our device join this telegram group

Credits:-
Dhruv Agarwal (me)
Jwalit Vyas (Orangelalo at telegram)
 

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Last edited:

himfa71

Senior Member
Mar 24, 2015
477
127
31
Mumbai
Great work, good for k8plus user, my brother was waiting for this, going to tell him,


Please add a tutorial on how to flash stock firmware if anything goes wrong,
 
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Reactions: Dhruv_Agarwal

ocorner543

Member
Apr 17, 2015
9
2
Lenovo k8 plus xt1902-2 bootloader wont Unlock/Lock

I'm using Lenovo k8 plus xt1902-2. I Successfully unlocked my bootloader using command ''fastboot oem unlock'' and in fastboot mode it says Device Status: unlocked (see attachment) but when i try to flash TWRP i'm getting error

platform-tools>fastboot flash recovery r
ecovery.img
target reported max download size of 536870912 bytes
sending 'recovery' (14280 KB)...
OKAY [ 0.428s]
writing 'recovery'...
FAILED (remote: not allowed in locked state)
finished. total time: 0.445s

Even worse when i use command ''fastboot getvar all'' to check my bootloader status it says

(bootloader) partition-type:preloader: raw data

(bootloader) serialno: 0123456789ABCDEF

(bootloader) off-mode-charge: 1

(bootloader) warranty: yes

(bootloader) unlocked: no

(bootloader) efuse: yes

(bootloader) secure: yes

(bootloader) kernel: lk

(bootloader) product: MARINO

(bootloader) hwid: 0

(bootloader) version-preloader:

(bootloader) version: 0.5

all: Done!!
finished. total time: 0.896s

I even tried to flash Twrp using sp flash tool with no luck. It gives error STATUS_INSUFFICIENT_BUFFER (0xC0010007)
Then i tried to lock the bootloader just so that i can start the unlock procedure again, but it just doesn't lock. I tried to flash stock Rom thru Sp flash tool using each and every mode (download load only, firmware upgrade, format all + download) the boot loader just doesn't lock again. :(

Please help me with this as i really want to install TWRP and root my device . Thanks!
 
Last edited:

AbuUmayr

Senior Member
Feb 1, 2015
56
4
Handwara
Whilst flashing the stock firmware from the above link, it...
Gives me chip hw_code mismatch error
scatter: MT6757D
Device: MT6757
SP flash tool v5.1628_Win

And STATUS_INSUFFICIENT_BUFFER (0xC0010007) whilst using SP Flash Tool v5.1728_Win
 
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Reactions: [email protected]

Dhruv_Agarwal

Senior Member
Dec 31, 2016
234
168
Moradabad
I'm using Lenovo k8 plus xt1902-2. I Successfully unlocked my bootloader using command ''fastboot oem unlock'' and in fastboot mode it says Device Status: unlocked (see attachment) but when i try to flash TWRP i'm getting error

platform-tools>fastboot flash recovery r
ecovery.img
target reported max download size of 536870912 bytes
sending 'recovery' (14280 KB)...
OKAY [ 0.428s]
writing 'recovery'...
FAILED (remote: not allowed in locked state)
finished. total time: 0.445s

Even worse when i use command ''fastboot getvar all'' to check my bootloader status it says

(bootloader) partition-type:preloader: raw data

(bootloader) serialno: 0123456789ABCDEF

(bootloader) off-mode-charge: 1

(bootloader) warranty: yes

(bootloader) unlocked: no

(bootloader) efuse: yes

(bootloader) secure: yes

(bootloader) kernel: lk

(bootloader) product: MARINO

(bootloader) hwid: 0

(bootloader) version-preloader:

(bootloader) version: 0.5

all: Done!!
finished. total time: 0.896s

I even tried to flash Twrp using sp flash tool with no luck. It gives error STATUS_INSUFFICIENT_BUFFER (0xC0010007)
Then i tried to lock the bootloader just so that i can start the unlock procedure again, but it just doesn't lock. I tried to flash stock Rom thru Sp flash tool using each and every mode (download load only, firmware upgrade, format all + download) the boot loader just doesn't lock again. :(

Please help me with this as i really want to install TWRP and root my device . Thanks!

Please PM me at telegram I have the same username


Whilst flashing the stock firmware from the above link, it...
Gives me chip hw_code mismatch error
scatter: MT6757D
Device: MT6757
SP flash tool v5.1628_Win

And STATUS_INSUFFICIENT_BUFFER (0xC0010007) whilst using SP Flash Tool v5.1728_Win



Use this version of SP flash tool
 

gurdeep141

New member
May 7, 2012
4
0
lenovo k8 plus stuck at logo and keep rebooting

hi friends today i factory reset my rooted phone lenovo k8 plus
but now its keep rebooting and not starting
pls help
 

AbuUmayr

Senior Member
Feb 1, 2015
56
4
Handwara
Tweak worked

Chip mismatch! Same error continues

Now finally worked, by remaining the MT6757 to MT6757D in all the text files in the Extracted ROM folder... alhamdulillah

---------- Post added at 07:45 AM ---------- Previous post was at 07:43 AM ----------

First showed the same chip mismatch error, but finally worked, by remaining the MT6757 to MT6757D in all the text files in the Extracted ROM folder... alhamdulillah.
Thanks for suggesting this version of tool
 
  • Like
Reactions: mdhuma

chankruze

Senior Member
Jun 30, 2017
224
257
Balasore
chankruze.github.io
Okay I'll post it soon.


I have tried it but that was not working at least for me.

It is working.
Main thing is you need to be on September/november security patch after that follow the above guide .
You phone will be rooted without TWRP.
Generally root access means patch on stock boot.img which is done by dhruv.
Whenever you flash magisk it patches your boot.img to give you root access. Thanks to Magisk Devs.

After following the OP you call install flashify to flash zips & images further you can also flash twrp image for marino and reeboot to TWRP.(twrp 3.1.1 works perfectly with a little bug , dimmed screen at starting time of TWRP).
 

mzak92

New member
Oct 12, 2017
4
0
platform-tools>fastboot flash recovery r
ecovery.img
target reported max download size of 536870912 bytes
sending 'recovery' (14280 KB)...
OKAY [ 0.428s]
writing 'recovery'...
FAILED (remote: not allowed in locked state)
finished. total time: 0.445s

having same problem. please help
 
Last edited:

RockyBopanna

Member
Jul 16, 2018
5
1
I'm lost in between. please help. I'm new to rooting.

How to unlock bootloader & get root for Lenovo K8 Plus

**********Pre-requirements***********

1. Make sure you have 70% charge or more then that.
2. Follow all steps correctly otherwise you will end up with a bricked phone.
3. I'm not responsible for any damage to your phone.
4. Make sure that you have installed usb drivers.
5. Download ADB & Fastboot Drivers

Steps to Unlock Bootloader

1. First of all, enable the Developer Option
To Enable the Developer Option, Go to your Settings -> About -> Software Information -> More -> Now Tap on the Build Number 7-8 Times until you see a toast message “Developer option enabled"

2. Go back to settings -> Now you need to enable the OEM Unlock by going to Settings -> Developer Option and Enable OEM Unlock and USB Debugging

3. Download and Extract the Downloaded ADB fastboot Zip file on your phone.

4. Now connect your phone to Computer using USB Cable.
When you connect your Phone to Computer, please wait until all the drivers get installed.

5. In your ADB fastboot folder open a command prompt window by pressing Shift Key + Right Mouse Click
Now type the command in your command window
Code:
adb devices

6. If you see a pop up to allow USB Debugging on your phone, Click OK
Now type the command below to reboot your phone to bootloader
Code:
adb reboot bootloader

7. Once your phone reboot into bootloader, make sure your phone shows the bootloader locked and then type the command below to make sure fastboot drivers are installed properly.
Code:
fastboot devices

8. This command will list the connected devices. If your phones serial number shows up you are good to go and may continue. If the phone is NOT listed this indicates that your drivers are not installed correctly. In order for you to continue, you must fix your drivers so that your phone is listed under fastboot devices.

9. If the phone has been recognized by the command above, proceed to unlock the bootloader with the following command:
Remember that this step will wipe EVERYTHING off the phone. Also you'll loose your warranty!!
Code:
fastboot oem unlock

10. After the above command has finished executing, run the following
Code:
fastboot reboot

The phone will reboot. Wait until the phone has fully booted up into Android.

Root method
Note:- All credits for it goes to @topjohnwu for his amazing magisk
Requirements:-
1. Make sure you are on latest September patch firmware.
2. Download patched_boot.img created from magisk mangaer.

Instructions:-

1. Connect up your phone then type:-
Code:
adb reboot bootloader

2. Copy patched_boot.img in adb folder.
Now type
Code:
fastboot flash boot patched_boot.img

3. Open up you device & install magisk manager from here

Voilla you're rooted.

Stock firmware - here

Now, I'm working on a working TWRP for our device so be patient.

If you want to make help in the development for our device join this telegram group

Credits:-
Dhruv Agarwal (me)
Jwalit Vyas (Orangelalo at telegram)

In Root Method Steps.
After 2. What do you mean by, ( 3. Open up you device & install magisk manager from here )
Should I use "fastboot reboot" in ADB and then install an APK or something? If not, How to install the Magisk Zip File? Please Help me in detail. I'm Lost. :( Sorry for the trouble.
 
Jan 23, 2018
9
3
21
Pune
Found something useful for development of TWRP

https://m.youtube.com/watch?feature=youtu.be&v=Nb9FmMxQSrQ"]https://m.youtube.com/watch?feature=youtu.be&v=Nb9FmMxQSrQ
I found this for oreo twrp of k8 note. can it be used to make twrp for k8 plus oreo.
 

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    How to unlock bootloader & get root for Lenovo K8 Plus

    **********Pre-requirements***********

    1. Make sure you have 70% charge or more then that.
    2. Follow all steps correctly otherwise you will end up with a bricked phone.
    3. I'm not responsible for any damage to your phone.
    4. Make sure that you have installed usb drivers.
    5. Download ADB & Fastboot Drivers

    Steps to Unlock Bootloader

    1. First of all, enable the Developer Option
    To Enable the Developer Option, Go to your Settings -> About -> Software Information -> More -> Now Tap on the Build Number 7-8 Times until you see a toast message “Developer option enabled"

    2. Go back to settings -> Now you need to enable the OEM Unlock by going to Settings -> Developer Option and Enable OEM Unlock and USB Debugging

    3. Download and Extract the Downloaded ADB fastboot Zip file on your phone.

    4. Now connect your phone to Computer using USB Cable.
    When you connect your Phone to Computer, please wait until all the drivers get installed.

    5. In your ADB fastboot folder open a command prompt window by pressing Shift Key + Right Mouse Click
    Now type the command in your command window
    Code:
    adb devices

    6. If you see a pop up to allow USB Debugging on your phone, Click OK
    Now type the command below to reboot your phone to bootloader
    Code:
    adb reboot bootloader

    7. Once your phone reboot into bootloader, make sure your phone shows the bootloader locked and then type the command below to make sure fastboot drivers are installed properly.
    Code:
    fastboot devices

    8. This command will list the connected devices. If your phones serial number shows up you are good to go and may continue. If the phone is NOT listed this indicates that your drivers are not installed correctly. In order for you to continue, you must fix your drivers so that your phone is listed under fastboot devices.

    9. If the phone has been recognized by the command above, proceed to unlock the bootloader with the following command:
    Remember that this step will wipe EVERYTHING off the phone. Also you'll loose your warranty!!
    Code:
    fastboot oem unlock

    10. After the above command has finished executing, run the following
    Code:
    fastboot reboot

    The phone will reboot. Wait until the phone has fully booted up into Android.

    Root method
    Note:- All credits for it goes to @topjohnwu for his amazing magisk
    Requirements:-
    1. Make sure you are on latest September patch firmware.
    2. Download patched_boot.img created from magisk mangaer.

    Instructions:-

    1. Connect up your phone then type:-
    Code:
    adb reboot bootloader

    2. Copy patched_boot.img in adb folder.
    Now type
    Code:
    fastboot flash boot patched_boot.img

    3. Open up you device & install magisk manager from here

    Voilla you're rooted.

    Stock firmware - here

    Now, I'm working on a working TWRP for our device so be patient.

    If you want to make help in the development for our device join this telegram group

    Credits:-
    Dhruv Agarwal (me)
    Jwalit Vyas (Orangelalo at telegram)
    1
    Wow!!thanks for posting this ??
    1
    Great work, good for k8plus user, my brother was waiting for this, going to tell him,


    Please add a tutorial on how to flash stock firmware if anything goes wrong,
    1
    Great work, good for k8plus user, my brother was waiting for this, going to tell him,


    Please add a tutorial on how to flash stock firmware if anything goes wrong,

    Okay I'll post it soon.

    already shared by XN Logos twrp also available
    I have tried it but that was not working at least for me.
    1
    Whilst flashing the stock firmware from the above link, it...
    Gives me chip hw_code mismatch error
    scatter: MT6757D
    Device: MT6757
    SP flash tool v5.1628_Win

    And STATUS_INSUFFICIENT_BUFFER (0xC0010007) whilst using SP Flash Tool v5.1728_Win