[GUIDE][K920] Unlock bootloader on Lenovo VIBE Z2 Pro

[Mittul Shah]

Does it work on v288 ?

 

[milan_svk]

sure it works

---------- Post added at 14:02 ---------- Previous post was at 13:57 ----------

for all.. dont use this f*** win8 or newer

 

[Mittul Shah]

It sticks on waiting for reset done and then it shows an error.
Download fail :Firehose Fail Fail to find QDLoader port after switches

 

[adithebratt]

Hello,

Everytime I try this method I am getting the below error

Process Index:0
Programmer Path:C:\Users\user\Downloads\UnlockBootloader_LP_R OW\UnlockBootloader_LP_ROW\prog_emmc_firehose_8974 .mbn
Image Search Path:C:\Users\user\Downloads\UnlockBootloader_LP_R OW\UnlockBootloader_LP_ROW
Please select the XML file
Start Download
COM Port number:7
Switch To EDL
Download Fail:System.Exception: Failed to Switch to Emergency Download mode

at QC.QMSLPhone.Phone.QPHONEMS_SwitchToEDL()

at QC.SwDownloadDLL.SwDownload.SwitchToEDL()
Download Fail:Switch To EDL FailSystem.Exception: FireHose Fail

at QC.SwDownloadDLL.SwDownload.SwitchToEDL()

at QFIL.Tech.DownloadTech.SwitchToEDL()
Finish Download

Note : I am on Lenovo Vibe z2 Pro Stock rom build S288[rooted]

 

[Jagadish-ravi]

Any idea how to unlock bootloader of lenovo vibe P1 with mm6.0.1

Sent from my Lenovo P1a42 using XDA-Developers mobile app

 

[lookasko]

Relock?

Is it somehow possible to relock bootloader for purpose of warranty repair?

Thank you.

 

[Tasurinchi]

Reactivating this thread after a while, I'm also getting the dread "Download Fail:System.Exception: Failed to Switch to Emergency Download mode" error...

Any suggestion? All drivers have been installed properly. I tested this in three different computers with Win7, Win8.1 and Win10. I also tried repeating the process with no success...

Edit: Adding some tech data:
- Stock KitKat 4.4.2
- Version number: K920_ROW_S130_140923
- Phone rooted with KingRoot

 

[Qron]

Deleted

 

[freakfun]

Google drive error

dear sir
the google drive is giving error and does not allow to download the files.
Can you please give a different link?

 

[Electry]

Is it somehow possible to relock bootloader for purpose of warranty repair?

Yes, by reflashing stock firmware.

dear sir
the google drive is giving error and does not allow to download the files.
Can you please give a different link?

Updated to mega.nz

 

[pkb_always4u]

Yes, by reflashing stock firmware.


Updated to mega.nz

Bro, You have updated the TWRP for this mobile. I am going to get this mobile tomorrow so just need your advise whether unlocking bootloader is available or not? Some of the users complaining about error.

Thanks

 

[Tasurinchi]

Some of the users complaining about error.

Me, for example...

 

[pkb_always4u]

Me, for example...

Appreciate your proving my doubt.

Plz advice me to get this mobile or not. I am getting it at 130 usd or 9999 INR (Refurbished).

Can it be a daily driver yet?

 

[Tasurinchi]

I really like that phone, the screen is gorgeous and the build quality is excellent... However, if you don't manage to unlock the bootloader (like me) then you're stuck at 5.0.1, and considering that Android 7 is already out there

 

[pkb_always4u]

I really like that phone, the screen is gorgeous and the build quality is excellent... However, if you don't manage to unlock the bootloader (like me) then you're stuck at 5.0.1, and considering that Android 7 is already out there

I too love the design. Its F**King awesome I cant help buying.

 

[Tasurinchi]

I too love the design. Its F**King awesome I cant help buying.

Then good luck with the purchase! :good:

And keep us updated if you manage to unlock the bootloader, unfortunately the feedback in this thread is very sparse ... :crying:

 

[cyprien T]

I have a problem after apply this unlock bootloader on my K920?* CN kitkat.

?*

Now I don't any partition. Specially "Preload" . It's strange all is ok with QFIL but the status bar is very quick to update the partition (roughly 10 seconds...). How can I rebuild all partion on my K920? Thanks!!!!

?*

LOG QFILE :

?*

Process Index:0

Programmer Path:C:\UnlockBootloader_KK_CN\prog_emmc_firehose_8974.mbn

Image Search Path:C:\UnlockBootloader_KK_CN

Please select the XML file

Start Download

Program Path:C:\UnlockBootloader_KK_CN\prog_emmc_firehose_8974.mbn

COM Port number:4

Sahara Connecting ...

Sahara Version:2

Start Sending Programmer

Download Fail:System.Exception: Unable to download Flash Programmer using Sahara Protocol

?*

?*?* ?* QC.QMSLPhone.Phone.QPHONEMS_SaharaArmPrgDownload(String sFileName)

?*

?*?* ?* QC.SwDownloadDLL.SwDownload.QPHONEMSSaharaDownloadArmPrg(UInt64& version, String armPrgPath)

Download Fail:Sahara FailSahara Fail

Finish Download

Start Download

Program Path:C:\UnlockBootloader_KK_CN\prog_emmc_firehose_8974.mbn

COM Port number:4

Sahara Connecting ...

Sahara Version:2

Start Sending Programmer

Sending Programmer Finished

Switch To FireHose

Max Payload Size to Target:49152 Bytes

Device Type:eMMC

Platform:8x26

Disable Ack Raw Data Every N Packets

Ack Raw Data:False

Skip Write:False

Always Validate:False

Use Verbose:False

COM Port number:4

Sending NOP

FireHose NOP sent successfully

Sending Configuration

Device Type:eMMC

Platform:8x26

Request payload size 0xc000 is not the same as support payload size, change to 0x20000

Set TxBuffer 0x20000, RxBuffer 0x4000

Firehose configure packet sent successfully!

Total Bytes To Program 0xA5EA0

Download Image

PROGRAM: Partition 0, Sector: 0, Length: 33 Sectors, Sector Size: 512 Bytes

File: C:\UnlockBootloader_KK_CN\gpt_backup0.bin

PROGRAM: Written Bytes 0x4200 (64)

Program Size: 0.02 MB

PROGRAM: Partition 0, Sector: 0, Length: 34 Sectors, Sector Size: 512 Bytes

File: C:\UnlockBootloader_KK_CN\gpt_main0.bin

PROGRAM: Written Bytes 0x4400 (64)

Program Size: 0.02 MB

PROGRAM: Replace the partition sectors number 0x1000 to file size in sector 0x4ec

PROGRAM: Partition 0, Sector: 264232, Length: 1260 Sectors, Sector Size: 512 Bytes

File: C:\UnlockBootloader_KK_CN\emmc_appsboot.mbn

PROGRAM: Written Bytes 0x9d800 (64)

Program Size: 0.62 MB

Total Size: 0.65 MB

Total Size: 0 Seconds

PATCH: Partition 0, Sector: 7, Offset 168 Bytes, Size: 8 Bytes, Value: NUM_DISK_SECTORS-34.

PATCH: Partition 0, Sector: 0, Offset 168 Bytes, Size: 8 Bytes, Value: NUM_DISK_SECTORS-34.

PATCH: Partition 0, Sector: 1, Offset 48 Bytes, Size: 8 Bytes, Value: NUM_DISK_SECTORS-34.

PATCH: Partition 0, Sector: 0, Offset 48 Bytes, Size: 8 Bytes, Value: NUM_DISK_SECTORS-34.

PATCH: Partition 0, Sector: 1, Offset 32 Bytes, Size: 8 Bytes, Value: NUM_DISK_SECTORS-1.

PATCH: Partition 0, Sector: 0, Offset 24 Bytes, Size: 8 Bytes, Value: NUM_DISK_SECTORS-1.

PATCH: Partition 0, Sector: 0, Offset 72 Bytes, Size: 8 Bytes, Value: NUM_DISK_SECTORS-33.

PATCH: Partition 0, Sector: 1, Offset 88 Bytes, Size: 4 Bytes, Value: CRC32(2,3072)

PATCH: Partition 0, Sector: 0, Offset 88 Bytes, Size: 4 Bytes, Value: CRC32(NUM_DISK_SECTORS-33.,3072)

PATCH: Partition 0, Sector: 1, Offset 16 Bytes, Size: 4 Bytes, Value: 0

PATCH: Partition 0, Sector: 1, Offset 16 Bytes, Size: 4 Bytes, Value: CRC32(1,92)

PATCH: Partition 0, Sector: 0, Offset 16 Bytes, Size: 4 Bytes, Value: 0

PATCH: Partition 0, Sector: 0, Offset 16 Bytes, Size: 4 Bytes, Value: CRC32(NUM_DISK_SECTORS-1.,92)

Total download file size: 0,6479492MB

Throughput: 0M/s

Reset Phone

Waiting for reset done...

Download Fail:FireHose Fail Fail to find QDLoader port after switch

Finish Download

?*

Partition on my K920

?*

 

[dygary]

Vibe Z2 Pro doesn't run!

I did every steps successfully but after done, device didn't run and just lenovo logo appeared on screen without any action.:crying::crying::crying:
pls help!
Vibe Z2 Pro CN lollipop

 

[leecs]

I did every steps successfully but after done, device didn't run and just lenovo logo appeared on screen without any action.:crying::crying::crying:
pls help!
Vibe Z2 Pro CN lollipop

how's your phone now?

 

[Electry]

I did every steps successfully but after done, device didn't run and just lenovo logo appeared on screen without any action.:crying::crying::crying:
pls help!
Vibe Z2 Pro CN lollipop

If it still doesn't work, google for QPST firmware for K920 CN (your device), I think you can find it over at 4pda or bbs.lenovo.com