yashsingh1/xdaforums huggingface dataset:
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] Electry:
How to unlock bootloader on Lenovo VIBE Z2 Pro - for ROW and CN version, KK and LP firmware

Tested on ROW version with S226 & S246 & S271 firmware.

Original thread -HERE-

Disclaimer

I am not responsible for anything that happens to your phone or computer. You have to understand what you are doing.

Preparation​

Download required files below.

Install necessary drivers - LenovoUsbDriver and Qualcomm USB Drivers.

Unlocking​

Extract UnlockBootloader.zip to the root of your drive (C:/) on your PC.

Turn off your phone and unplug the USB cable from your PC.

Install and open the QFIL utility.

Fill in following lines:

Now hold Volume+ button and plug the USB cable to your PC.

(optional) For about ~3 seconds you should see "Lenovo HS-USB QDLoader xxxx" in your device manager.

(This is just to check whether you have necessary drivers installed correctly)

(optional) Unplug the USB cable and do 5. step again.

Immediately after plugging the USB cable press Download in QFIL utility.

Wait for finish, your phone should reboot automatically.

Done!

Downloads

LenovoUsbDriver 1.0.12 [9.3 MB]

Qualcomm USB Drivers [4.1 MB]

QPST 2.7.422 (QFIL utility) [25.1 MB]

ROW (International version)

UnlockBootloader.zip for Lollipop (ROW) (latest) [243 kB]

UnlockBootloader.zip for KitKat (ROW) [231 kB] Update via OTAs to Lollipop!

CN (Chinese version)

UnlockBootloader.zip for Lollipop (CN) (latest) [243 kB]

UnlockBootloader.zip for KitKat (CN) [231 kB] Update via OTAs to Lollipop!
​

XDA:DevDB Information

[GUIDE] Unlock bootloader on Lenovo VIBE Z2 Pro, Tool/Utility for the Android General

Contributors

Electry, SevenMaxs

Version Information

Status: Stable

Current Stable Version: s288

Stable Release Date: 2015-05-24

Current Beta Version: s143

Beta Release Date: 2015-05-18

Created 2015-07-31

Last Updated 2015-08-24
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] lookasko:
Relock Bootloader

Hello

is there any way to also relock bootloader?

Thanks
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] ppllpp:
has anyone tried to unlock version S246 with this method?
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] ppllpp:
Ok,I had not read all the way down the first post .
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] drpainster:
I tried this tutorial many times without success (in some reason QDLoader was disappeared).

But (maybe it will be useful for other members), after 6. step, without unpluging the phone and without doing 4. step again, i immediately press download in QFIL. This way was successful!
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] Electry:
Sorry, there was typo in 6th step. It is just for checking if you have installed drivers correctly. (you can skip that)
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] Z953RR:
is it working on S271 row ROM??
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] ppllpp:
[MENTION=5226301]Z953RR[/MENTION], worked for me.
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] patko226:
how I can check if is bootloader unlocked?

edit: after click on download button, I have message waiting for reset done but phone is starting normally and after that I have message failled....

Download Fail:FireHose Fail Fail to find QDLoader port after switch
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] underr.t:
K... So this is the deal. It seams that I can't install Qualcomm USB drivers on Windows 10(or at least I haven't found a way to do so)... Anyone else had this problem??
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] Electry:
Any error message or something? It was a long time ago when I did this, but you can try disabling driver signature verification.
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] underr.t:
DriverInstaller64 won't start at all. I even put it in Windows Vista compatibility mode - still nothing. I'm running Win10 64 bit ver.

---------- Post added at 09:50 PM ---------- Previous post was at 09:16 PM ----------

this is is the message I get in qfill util after following all steps(is that normal or it didnt unlocked bootloader):

Reset Phone

Waiting for reset done...

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

Finish Download
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] SilveRRing:
I have this problem too. But I'm using Windows 10. Does anyone have this problem and was able to solve it? I'm stuck with a locked bootloader, without Gapps and I can't go backwards ou upwards in ROM version. The code *#*#8899*#*# doesn't do anything either, no new devices in Windows device manager.
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] bnsuki:
I wasn't able to install the Qualcomm drivers either but the Qfile still worked for me. It seems some lenovo phones come with the drivers in the phone that automatically install when you connect it via usb
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] muscle man:
the qpst2.7 is not installing on my windows 8. wat can i do?

the qpst2.7 is not installing on my windows 8. wat can i do?
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] SilveRRing:
Try to install as an administrator or compatibility mode. Good luck

Enviado do meu Lenovo K910 através de Tapatalk
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] Nandycko:
Not working on s277_151029_ROW i cant unlock bootloader.... pls help
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] smorad:
i can not unlock bootloader

qfil is give me error...

COM Port number:20

Sahara Connecting ...

Download Fail:QC.QMSLPhone.PhoneException: Could not connect to the COMPORT

at QC.QMSLPhone.Phone.ConnectToServer_Sahara(UInt32 comPort, UInt64& version, Int32 mode, UInt64 timeout)

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

Download Fail:Sahara FailValue cannot be null.

Parameter name: key

Finish Download
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] Kiranveer Singh:
Lenovo Vibe P1

hi guys i have lenovo vibe p1,, plaese help me to unlock bootloader .... plz plz rply me
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] GuestK00219:
ignore, i posted some bull**** here
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] Mittul Shah:
Does it work on v288 ?
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] 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
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] 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
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] 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]
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] Jagadish-ravi:
Any idea how to unlock bootloader of lenovo vibe P1 with mm6.0.1
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] lookasko:
Relock?

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

Thank you.
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] 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
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] Qron:
Deleted
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] 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?
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] Electry:
Yes, by reflashing stock firmware.

Updated to mega.nz
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] pkb_always4u:
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
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] Tasurinchi:
Me, for example... :D
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] pkb_always4u:
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?
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] 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 :(
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] pkb_always4u:
I too love the design. Its F**King awesome :) I cant help buying.
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] Tasurinchi:
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:
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] 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
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] leecs:
how's your phone now?
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] Electry:
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
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] leecs:
hi, my last attempt i refreshed my CN phone with ROW (with CN modem files)

any idea which file should I use now? ROW or CN?

how to tell if unlocked successfully?

if after adb reboot bootloader, i failed to fastboot flash recovery.img, means not unlocked ( stuck as "Waiting Any device" ), right?
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] user700512:
While in fastboot mode, check again the syntax - fastboot flash recovery recovery.img.

(You have probably renamed already "TWRP_3.0.2-2_K920.img" to "recovery.img" before flashing). ;)
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] leecs:
oh...will check again tonight :)

TQ
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] nikods:
HI I have same build as you (K920_S288_160224_ROW), did you manage to do it? Also I do not understand, I presume I have to root it at first? How do I do it on this build, there are some how to's but none has our build in supported list :(

Thanks Niko

ps Kako je u Bugarskoj komsija :) pozdrav iz Beograda
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] user700512:
Zdravo, nikods!

Yes, the unlock procedure was successful.

I had SuperSU installed on the stock K920_S288_160224_ROW before that. But, I don't think root is needed when you unlock the bootloader.

When you flash a CM/LA-based ROM later on, you will have root in it.

I used QPST 2.7.437 (because I had it already installed for the root procedure) instead of the suggested here QPST 2.7.422.

Be sure to follow exactly the unlock guide. And also, do as I did - when you choose the necessary files, exit QPST, then start it again, check the paths in QPST and then do the unlock.

Far as I remember, it required a bit of speed with 3 hands altogether to start flashing while port open, but it was successful after all.

Pozdrav and ziveli! ;)
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] leecs:
from the computer Device Manager at Port there, I can see those hidden devices with Lenovo HS-USB xxx and also QualComm but somehow only QualComm get activated and not Lenovo HS-USB.

I can read phone content and copy / delete from it..but during FASTBOOT FLASH recovery recovery.img, I always get <Waiting for device>

Google it and told wrong driver which i suspect should have Lenovo HS-USB displayed but not QualComm...i uninstalled all Lenovo driver and re-install and i uninstall Qualcomm driver..i still see QualComm display there..

when I checked to view all Hidden Devices, I see list of Lenovo drivers (Port 6,7,8,9)and QualComm (Port 5). I even changed the Port 5 to Port 10 just incase display according to sequential manner but still "Waiting for Device" during Fastboot reflash recovery recovery.img..

any clue?
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] leecs:
Hi,

at Step 5, in your Device Manager, did you see

QualComm HS-USB xxx Or Lenovo HS-USB xxx appeared?

I always see QualComm eventhough i have Lenovo driver installed and i can manage the phone content via the computer/notebook.

I am still stuck at Fastboot flash recover recover.img with response <Waiting for devices>
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] user700512:
I hope somebody with more experience could help you.

For me it was easier to get all done within QFIL, rather than check device/port in Device Manager and repeat. Anyway, yes, it appeared for a few seconds in Device Manager.

To my opinion, if you are in a fastboot screen on your phone (a small green android in the center of a black screen) and you cannot execute a fastboot command from cmd, it may be because of a faulty USB cable. Try "fastboot devices" first.
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] leecs:
Yes, I do get a small green android in the middle of screen after i entered "adb reboot bootloader"

when with green android in the middle "fastboot flash recovery recovery.img" just give me <Waiting for device> and stopped there till I reboot the phone manually 15mins later.

---------- Post added at 02:16 PM ---------- Previous post was at 02:10 PM ----------

Yes, just that when not proceeding and stuck with "waiting for device" after many weeks, i have to read for other possibilities of the cause.

I still have Qualcomm HS-USB QLoader xxxx instead of Lenovo HS-USB QLoader xxx
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] user700512:
Start over and unlock your bootloader with the correct files. Since you have communication with the phone (copy files/execute adb commands), it means that you have the necessary drivers and a good USB cable.
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] leecs:
I thought the same too.

I retried many times with unlock bootloader d...but still <waiting for devices> at fastboot flash recovery recovery.img
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] user700512:
Copy/paste here the output from QFIL when you unlock. It should be similar to what I posted before.

Without an unlocked bootloader it is pointless to try to flash a recovery.
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] leecs:
Just now another attempt.

BUT this round with another USB cable (I tried 2 other good USB cables earlier on)

and I managed to flash TWRP :)

But now I hit Error 7 when trying to flash ROM
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] user700512:
I think that's more a ROM topic than TWRP.

(Although off-topic, I remember having to re-download a ROM, re-wipe partitions, then format /cache and /data (posted here).

Edit: I saw you've managed it (here) - great! :) It might still be a good idea to share your experience. ;)
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] leecs:
I did few things on that to get it resolved.

1. I flashed SU root.

2. I format the system/data on the phone too.

Now another happy user on LineageOS 14.1 :)

I just sent out little donation as token of appreciation. Will continue doing so with the subsequent update and effort put in. Good job, guys!
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] doomon:
Hello guys,

I am trying unlock all day but no luck. I am using Windows 10 pro x64 (but also tried Win 7). I have international version of Lenovo Z2 Pro (K920) with Android 5.0.2 (last OTA update), K920_S288_160224_ROW.

When i switched to newer version of QPST 2.7.437, it looks like i succeded, but still doesnt have TWRP after flashing it. My goal is to flash Lineage OS 7.1 ROM since Lenovo is obviously not going to provide even Android 6 for Lenovo K920.

What i do so far:

- run QFIL and set as in attached qfil.png (close and open after orig. step 4)

- holding vol+ until the phone turns of (yes, not reboot but turn of like user700512 said, in older QFIL it rebooted but failed with: "Download Fail:FireHose Fail Fail to find QDLoader port after switch")

- when QFIL end it looks like it should be unlocked (qfil.log attached) but when i use "fastboot oem device-info" it says Device unlocked: false

- however flashing recovery ends with OKAY (recovery.img is TWRP 3.1.0 from https://xdaforums.com/k920/development/recovery-team-win-recovery-project-3-0-t3454739)

- but when i boot my phone to recovery (using "abd reboot recovery" or by holding Vol+ and Vol- and Power -> holding just Vol+ and Power is not working for me) I am stil in Lenovo-Recovery instead of TWRP!!! WTF?! :mad:

Thx for eny help.

* Cannot add attachments for some reason, so here is links:

qfil.png https://www.dropbox.com/s/4yqp259a5wdjalm/qfil.png?dl=0

qfil.log https://www.dropbox.com/s/qeb75cmutu8pu3f/qfil.log?dl=0

flash_recovery.img https://www.dropbox.com/s/um98nxb7sy33r7x/flash_recovery.png?dl=0
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] Electry:
If 'fastboot flash' doesn't throw error the bootloader is unlocked.

The twrp might get overwritten with stock recovery on boot. I would try to boot straight into recovery.img (fastboot boot xxx.img) right after flashing the twrp and then, in twrp mount 'System' partition, open file manager (it's under Advanced menu AFAIK), look for something like 'install-recovery.sh' or 'recovery-from-boot.sh' (should be somewhere in /system/etc/) and remove/rename that file...

Or just wipe system partition or flash Lineage zip.

I'd give better instructions, but I'm not at home ATM.
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] doomon:
Thank you very much for perfect and fast answer. Booting straight to TWRP really works! Didnt really expect stock ROM overwritting recovery on every boot. Thank you!

P.S.: Vlastně si nemusíme psát anglicky, ale nevadí. :) Ať žijí češi a slováci!

---------- Post added at 03:40 PM ---------- Previous post was at 03:37 PM ----------

Also, for people who are getting the "Download Fail:FireHose Fail Fail to find QDLoader port after switch", just try newer version of QPST. Version 2.7.437 worked for me even on Win 10 pro x64 (even without using Qualcomm driver from main post). For some reason, i couldnt instal latest QPST 2.7.441, so for now i would recommend 2.7.437. The only difference is that you have to select "Flat Build" when start QFIL and that the phone turns off after unlock (instead of reboot).
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] r_m_f_f:
This procedure work on Lenovo VIBE X3 K51c78 with android 5.1 ROM VIBEUI_V2.9_1616_5.1340.1_ST_K51c78?

I have several problems with this device and I try update de ROM throught recovery mode but is not allowed, when it will start install (appear 0%), appear a X symbol in red.

So I need update the ROM but the device don't allow, anyone can help me?
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] realista87:
is not possible to use the other method of fastboot oem unlock command like in other phones?
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] slarionoff:
Booting FAILED (remote: 'dtb not found')

Hi Electry!

I have a similar problem. I'm able to flash a recovery, but I can't reboot into it:

E:\Downloads\Lenovo-K920>fastboot flash recovery recovery.img

Sending 'recovery' (14724 KB) OKAY [ 0.476s]

Writing 'recovery' OKAY [ 0.211s]

Finished. Total time: 5.507s

E:\Downloads\Lenovo-K920>fastboot boot recovery.img

Sending 'boot.img' (14724 KB) OKAY [ 0.487s]

Booting FAILED (remote: 'dtb not found')

fastboot: error: Command failed

E:\Downloads\Lenovo-K920>

Could you please tell me what should I do in order to fix that? Thanks a lot in advance! Dekuje moc!
[Lenovo Vibe Z2 Pro Guides, News, & Discussion] datagrab:
Worked

For those having errors installing after opening C:\Program Files (x86)\Qualcomm\QPST\bin\QFIL.exe, don't run as an admin and don't follow the optional steps. Pressing volume down didn't worked for me but I tried pressing up, as I've seen in another forum after I googled the error. It worked then.
[G Pad 8.3 Q&A, Help & Troubleshooting] Herbiegaf3:
So I bought an LG G Pad 8.3 vk810 from Swappa a while back and up until this point I had only used it for general web browsing but I recently decided I wanted to use it as a car tablet. Yesterday I tried installing the Google Search app so I could use the "OK Google" voice commands and it would not install, gave an error saying something to the extent of application could not be installed (-24). Then when I was searching for the issue I noticed that a software upgrade was rolled out yesterday as well, so I tried installing the software update figuring maybe this would fix my issue but that failed as well.

After doing a little more research I took a look at my software info and it said that it had been modified so I downloaded the Root Checker app and sure enough it said I had root access. I have no use for root access on this and honestly I know little to nothing about it so I did a search for how to unroot and somebody mentioned using the "Full Unroot" built into Supersu. I tried this and it looks like I no longer have root access, however it didn't help any other issues. Does anybody have any idea what is preventing me from installing the Google Search app or doing system updates? Without knowing a whole lot about rooting is there any easy way to fix my issue?

Thanks,

Sean
[G Pad 8.3 Q&A, Help & Troubleshooting] roirraW "edor" ehT:
Hi!

The easiest for sure way to get your device to be the way you want it is to use "LG Flash Tool 2014" (Google for it on XDA) and download the KDZ file for 35A_08 5.0.2 that was just released. There's a link to it here [URL="[/URL].

You can *try* keeping your existing data/apps by using "Normal" mode in LG Flash Tool 2014, but I would personally move everything from internal storage that you want to keep and use "CSE" mode to completely wipe everything (except for your external SD card) and install it fresh. You'll have to set it back up the way you like it, but it will for sure be the way it's meant to be that way.
[G Pad 8.3 Q&A, Help & Troubleshooting] Herbiegaf3:
Thank you, I'm definitely not worried about deleting anything as I did 3 factory resets yesterday and erased everything anyway. What exactly does the KDZ file install? Does it send me back to factory settings and remove root?

Thanks again,

Sean
[G Pad 8.3 Q&A, Help & Troubleshooting] roirraW "edor" ehT:
You're welcome! A KDZ puts an LG device back to a factory fresh version of whatever stock ROM the KDZ is for. It rewrites:

Bootloader (aboot.img)

Kernel (boot.img)

modem.img

recovery.img

rpm.img

tz.img

Etc, and overwrites all your partitions except for your external SD card.

So it removes root and anything else you might have customized about it.
[Samsung Galaxy Mega] Gbetoyan:
Hello Guys, am having issues my samsung galaxy mega 6.3 LTE (i9205). am stuck on samsung boot logo and when i try to get into recovery mode it wont go into it instead it shows a recovery booting in blue letters and then automatically reboot and get in samsung boot logo again but i can go into download mode. so i decided to download the original stock rom from sammobile which i did then i flash it using odin , it was successful pass by odin bt when my device startup again it stuck again. please i need on this as soon as possible