"ENTER USB HOST MODE..." constant after update - HD7 General

Hello guys...please...i need your help!!! My phone in constant white screen and "ENTER USB HOST MODE..." message.
I tried with 2 process
- First process is "the sd card flashing method" (SCHUIMG.nbh file in SD Card) but nothing....loading file...off/on...Radio - ok....bootloader - ok...then restarts and same process many times for 10 or more minutes....then fail...white screen
- Second process is "Update process"...Loading...No Image file! connect USB cable to PC open "ROMUpdateUtility" and Update...perfect...process is now complete....but nothing, Tricolor screen and then the phone is stuck at Enter USB Host Mode..."...any idea??
My phone is from T-Mobile USA and i used this Update version:
-RUU_Schubert_TMOUS_1.20.531.01_Radio_5.51.09.11a_2 2.31.50.09_by_ansar mod
-RUU_Schubert_TMOUS_1.54.531.02_Radio_5.51.09.29a_2 2.32.50.10U_by_ansar
-RUU_Schubert_HTC_Europe_1.16.401.01_Radio_5.51.09. 06a_22.30.50.09U_by_ansar (this file used only SD Card method)
Thanks for ur help
BR,

hard reset your phone? do a google search on how to-do that..

maybe your camera button is pressed (or it hangs)...
you could try to get it out (if it is pressed)...
i hope that helps you

Guys thanks for your help but nothing....
i press the volumen keys and pwr button but not enter in reset menu...
and check I check the camera button but that's ok
another idea?...please let me know...

hi same problem here with HTC TROPHY please help me
THANKS

i have some problems with htc trophy
any solution ?

hd7 usb host mode solution need
I have same problem, flash phone to pc but problem not solv,
all time show enter usb host mode,
i try to flash this 2 file:
RUU_Schubert_O2_UK_1.19.206.01_Radio_5.51.09.06a_2 2.30.50.09_Signed
RUU_Schubert_O2_UK_1.68.206.03_Radio_5.63.09.13_3a _22.36.50.15_Signed
1st file phone flash 10% then error,
2nd file full flash ok but problem same,
please tell me how can i exit usb host mode...............

Can you post the screen of USB host mode. We might have the same problem

Oberoth said:
maybe your camera button is pressed (or it hangs)...
you could try to get it out (if it is pressed)...
i hope that helps you
Click to expand...
Click to collapse
I tried with ur solution n its worked, my phone is working perfect now

I have the same problem and my button is ok .
Is there any other solution ?
Thanks !

hi
i have the same problem
can someone explain me how flash from sd card please ,i tried but always loading or no file existing!!!!
thank you
br

Related

[PROBLEM] Bricked my Blackstone

Hi All.
I've had my flashed severtal times with the new ROM and never had any problems with it (apart from ROM itself not being perfect).
Yesterday I've cooked myself a plain ROM and flashed phone with it. Flash took less than a minute and my phone isn't starting any more. I've checked NBH file and it's only 6 MB!
At the moment all I can do it to is to try to turn it on, it stops on the 'Smart Mobility' screen with red info on the bottom. Info reads:
R 1.14.25.24
G 52.64.25.34U
D 1.59.48753
When I start my phone with Vol Down button pressed it goes to tricolor and when I continue to hold Vol Down I get white screen with message: Loading: No Image File! showing on the screen briefly and back to tricolor.
No problem you say - flash another ROM. But at the moment my phone doesn't connect to my PC. Cable tested with another HTC - works. When I connect it I get USB on the screen but Flashing utility doesn't detect the phone.
When I try to Hard Reset the phone it just starts normally. So Vol Up + Vol Down + Power doesn't work at all. All I have is smart mobility and tricolor.
Info from Tricolor:
BLAC100 32M
SPL-1.56.OliNex
MicroP-Blackstone (LED) v6
and on the bottom either Serial or USB.
Question is:
is there anything I can do to revive my phone? Is there any way to flash it without USB connection? If yes, how do I do it?
Thanks in advance,
There is a way of flashing from SD card if you have HSPL (you do... OliNex).
Please do some search...
if it displays usb in tricolor you can flash a rom with CustomRUU from there. its not bricked
Put BLACIMG.nbh on the root of your SD card and enter bootloader mode, it'll detect it and ask if you want to flash it - press power button to confirm.
Dont connect your phone to your computer.
Hold down the Volume down button and hit the power button.
Your entering the tricolor boot screen and at the bottom the word "Serial".
Now connect you phone to your computer with te USB cable the word serial disappear and now it says USB.
Now you can normally flash/update your phone.
Thank for all your answers.
Problem still lasts, tried everything I could, including trying another computer. I've tried SD card flashing but couldn't get past tricolor. Everytime I tried all I got was No image file! and nothing.
In desperate act of dying I've went to my neighbour and borrowed his old Win XP laptop and it worked... Currently flashing new ROM to it.
What I cannot understand is why my computer (iMac running Windows on parralels), my laptop (Win 7) and my second laptop (Win Vista) couldn't detect the phone. I've succesfully flashed it before using all three machines, including virtualized Win 7 on my mac :/
Any ideas why it stopped working? I'll try to connect it again when ROM will be fully flashed and let you know.
Thanks for your help anyway.
Cheers,
Why don't you try shipped ROM, it may do the trick.
Get the original shipped ROM from HTC site or from XDA site.
Extract the content in some directory
Rename ruu_signed.nbh to BLACIMG.nbh and copy it on root folder of your SD card.
Now start your phone holding Vol down button.
Fingers crossed to to start flashing
Hi again.
I can confirm that due to flashing my phone with that odd 6MB ROM I could not connect it to any computer running Windows Vista or Windows 7. Strangely enough - it worked with Windows XP Professional. I have managed to flash my phone again on it using custom ROM from this forum.
Cheers,
yeramihi said:
Hi again.
I can confirm that due to flashing my phone with that odd 6MB ROM I could not connect it to any computer running Windows Vista or Windows 7. Strangely enough - it worked with Windows XP Professional. I have managed to flash my phone again on it using custom ROM from this forum.
Cheers,
Click to expand...
Click to collapse
Glad you got this sorted. As your issue is now rectified I'm closing this thread

[q] how to unbrÄ°ck my phone? (i think)

Hi;
My phone doesn t open after I try something..It write "Security Error" and " Morning Call Is Empty"...
S/W mode cant open when I push volume + - .......and I made factory reset with power and volume -+...I have same error screen....
My pc doesnt communicate with phone properly.. Lg Pc Suite and Lg Mobile Support Tool can t connect to phone..
I tried emergeny firmware but it doesn t work because of phone-pc connection problem...
I checked many posts in forum and I tried some of them..Unfortunately doesntttt workkk....
I dont have so experience about android phones but I think this is brick haaa...
Plssssss helppppp meee.....
By the way it happened when I try to rollback from v20 to v10 .......
canyondem said:
Hi;
My phone doesn t open after I try something..It write "Security Error" and " Morning Call Is Empty"...
S/W mode cant open when I push volume + - .......and I made factory reset with power and volume -+...I have same error screen....
My pc doesnt communicate with phone properly.. Lg Pc Suite and Lg Mobile Support Tool can t connect to phone..
I tried emergeny firmware but it doesn t work because of phone-pc connection problem...
I checked many posts in forum and I tried some of them..Unfortunately doesntttt workkk....
I dont have so experience about android phones but I think this is brick haaa...
Plssssss helppppp meee.....
By the way it happened when I try to rollback from v20 to v10 .......
Click to expand...
Click to collapse
To get in S/W Mode you should press "Vol-" and connect to PC...
canyondem said:
Hi;
My phone doesn t open after I try something..It write "Security Error" and " Morning Call Is Empty"...
S/W mode cant open when I push volume + - .......and I made factory reset with power and volume -+...I have same error screen....
My pc doesnt communicate with phone properly.. Lg Pc Suite and Lg Mobile Support Tool can t connect to phone..
I tried emergeny firmware but it doesn t work because of phone-pc connection problem...
I checked many posts in forum and I tried some of them..Unfortunately doesntttt workkk....
I dont have so experience about android phones but I think this is brick haaa...
Plssssss helppppp meee.....
By the way it happened when I try to rollback from v20 to v10 .......
Click to expand...
Click to collapse
I have the same problem...
Sent from my MZ601 using xda premium
RuedasLocas said:
To get in S/W Mode you should press "Vol-" and connect to PC...
Click to expand...
Click to collapse
Unfortunately SW Mode doesn t work my friend......
canyondem said:
Unfortunately SW Mode doesn t work my friend......
Click to expand...
Click to collapse
First, take out the battery, press "Vol-" and connect to PC. Probably won't work... after that, disconnect from PC, put
back the battery, press "Vol-" and connect to PC.
Sometimes works, try it
RuedasLocas said:
First, take out the battery, press "Vol-" and connect to PC. Probably won't work... after that, disconnect from PC, put
back the battery, press "Vol-" and connect to PC.
Sometimes works, try it
Click to expand...
Click to collapse
Thank you for your help but unfortunately again same errorr..I think I need a garbage bag...
canyondem said:
Thank you for your help but unfortunately again same errorr..I think I need a garbage bag...
Click to expand...
Click to collapse
first of all you have to initialise the phone in S/W Upgrade mode.
without that is nothing more to do to revive the device...
you have to <stress> the phone very much... something similar happened to me and the procedure works after 20+ trys...
so:
- pull battery out and press <Vol Down> + <insert usb cable connected to PC> (10-20 times)
- with battery in switch off the phone (i presume switches work - power off, vol down, vol up), press <Vol Down>+ <insert usb cable connected to PC> (10-20 times) - that works for me and bring the phone in S/W Upgrade mode and from there i manage to flash the phone.
repet many times that procedures with usb cable connected to AC adapter.
maybe the USB cable not working anymore... make procedures with another USB cable...
i hope you persevered and bring the phone to life again.
Like said you should try many times...even mine did not go in sw mod at first tries
Inviato dal mio LG-P880

I can`t acces boot screen (power + volume buttons) for a hard reset on Huawei P7

i tryed to root my phone but i fail, now i can`t restart the soft, hard or install any update, any help will be welcome (sorry for bad english)
Hi,
I am going to move your thread to your device section so the experts there can help. It will be moved here, http://forum.xda-developers.com/ascend-p7/help
You will need to register on the site to respond to any replies. :good:
Good luck!
XDA Visitor said:
i tryed to root my phone but i fail, now i can`t restart the soft, hard or install any update, any help will be welcome (sorry for bad english)
Click to expand...
Click to collapse
download firmware for your P7 model ( L00, L07, L09, L10, L12 ) with PC, extract archive, take an sdcard make a folded in it, name it "dload", put "update.app" exracted before into the folder.
now turn offf your phone put sdcard in the slot, and do a force update (power, vol+, vol-, in same time)
wait for finish and it's done
Similar issue.
zaabolla said:
download firmware for your P7 model ( L00, L07, L09, L10, L12 ) with PC, extract archive, take an sdcard make a folded in it, name it "dload", put "update.app" exracted before into the folder.
now turn offf your phone put sdcard in the slot, and do a force update (power, vol+, vol-, in same time)
wait for finish and it's done
Click to expand...
Click to collapse
Hello there,
I have the same or similar problem, where my P7 won't boot at all, won't go into recovery mode or fast boot mode.
Only thing it does when i have it connected on the charger and try to boot it is flash the LED 4 times red color, then once green, it keeps doing that and that's all it does. i tried what you said and it won't work or boot, it does the same thing.
Your help would be appreciated.
MASTuR44 said:
Hello there,
I have the same or similar problem, where my P7 won't boot at all, won't go into recovery mode or fast boot mode.
Only thing it does when i have it connected on the charger and try to boot it is flash the LED 4 times red color, then once green, it keeps doing that and that's all it does. i tried what you said and it won't work or boot, it does the same thing.
Your help would be appreciated.
Click to expand...
Click to collapse
power off your phone by pressing power botton for 10 seconds
after that connect it to pc by usb cable
press "power botton" and "Vol-"
does the phone boot into fastboot mode?
zaabolla said:
power off your phone by pressing power botton for 10 seconds
after that connect it to pc by usb cable
press "power botton" and "Vol-"
does the phone boot into fastboot mode?
Click to expand...
Click to collapse
No, it doesn't, however when i connect it to the PC, the PC emits the USB sound (that you've plugged something in) but it doesn't identify or recognize anything.
MASTuR44 said:
No, it doesn't, however when i connect it to the PC, the PC emits the USB sound (that you've plugged something in) but it doesn't identify or recognize anything.
Click to expand...
Click to collapse
then there's no way to flash anything to it, the only way is by fastboot and adb commands
zaabolla said:
then there's no way to flash anything to it, the only way is by fastboot and adb commands
Click to expand...
Click to collapse
That means it's probably a hardware issue? the motherboard might be fried?
i think yes, sorry for you

My Z2 Pro dead .. help me ..!!

i did something Stupid and my Z2 Pro dead
there is no fast-boot and no recovery .. only black screen and when i press power button there is a short and long vibration just that and the LED there is flash yellow for 0.1 second
aljthab said:
i did something Stupid and my Z2 Pro dead
there is no fast-boot and no recovery .. only black screen and when i press power button there is a short and long vibration just that and the LED there is flash yellow for 0.1 second[/QUOTE try connecting it to the PC, if it doesn't show anything on PC then just hand it over to the lenovo service center and blame it on the device that it stopped booting :silly:. I thought i had bricked my device but they did something and gave it to me in 3 to 4 days and that was done under the warranty no extra charge and don't confess that I had rooted ur device , If u tell them that they will try to extort money from u :crying:
Click to expand...
Click to collapse
aljthab said:
i did something Stupid and my Z2 Pro dead
e LED there is flash yellow for 0.1 second
Click to expand...
Click to collapse
I have exactly the same, what to do? I installed the dev 44, the rate of established but after 15 minutes, logo is stalled, not waiting until the end of excess freewheeling dev 300, it is not fully established and bug crawled, I rebooted the machine and an endless vibration with green LED :crying:
1 Charging can be a little warm
2. can not be detected pc
3. can not access the fastboot mode
4. when charging, the notification light dies
5. deep flash cable has not helped
sorry my bad english
kerei said:
I have exactly the same, what to do? I installed the dev 44, the rate of established but after 15 minutes, logo is stalled, not waiting until the end of excess freewheeling dev 300, it is not fully established and bug crawled, I rebooted the machine and an endless vibration with green LED :crying:
1 Charging can be a little warm
2. can not be detected pc
3. can not access the fastboot mode
4. when charging, the notification light dies
5. deep flash cable has not helped
sorry my bad english
Click to expand...
Click to collapse
Refer to this http://zukfans.eu/community/threads/how-to-unbrick-zuk-z2-from-diagnostic-port-900e.2856/ and this http://zukfans.eu/community/threads/howto-flash-a-stock-zui-rom-zuk-z2-z2131-only.104/
same issue with zuk z2
adriano1593 said:
Refer to this http://zukfans.eu/community/threads/how-to-unbrick-zuk-z2-from-diagnostic-port-900e.2856/ and this http://zukfans.eu/community/threads/howto-flash-a-stock-zui-rom-zuk-z2-z2131-only.104/
Click to expand...
Click to collapse
Hello there... Any solution you found? I am stuck with my zuk z2 in same situation ?? any help ?
I have a similar problem.
What caused the black screen? -
History:
I booted to test mode at 2.5.033 ST, the phone got stucked at this menue there was no way to get out. TWRP Restore to Nandroid bougt only black screen after 2nd vibration and ZUK logo.
I fixed the Test mode bug, by flashing the ZUI 1.9.104 ST Stock ROM via QPST.
After the phone was "repaired" I unlocked the bootloader, installed TWRP, made a nandroid backup of fully stock ROM and restored a nandroid backup from before the test mode problem.
The nandroid restore was successful, I rebooted the phone and it was "dead". Black screen, only rebooting (perioldy vibrating) there was no end, until the battery was empty.
I got no luck to reach any mode with tricky button pressing (vol+ pwr; vol- pwr; vol+ vol- pwr; usb in vol-) nor Windows detecting the phone. That's why I decided to remove the back glass cover, to got access to the battery.
Now I'm able to get the phone detected by my PC.
What I did: disconnect the battery, connect the phone to my computer, pressed the vol- button and connect the battery.
This made my PC able to detect the phone, but no I have an other problem. Windows only detects the phone as "unknown usb device (device descriptor request failed)". I don't know any way to install the driver....
Maybe anyone is able to help me or has any tip?
Thanks!
Cheers,
m_atze
m_atze said:
I have a similar problem.
What caused the black screen? -
History:
I booted to test mode at 2.5.033 ST, the phone got stucked at this menue there was no way to get out. TWRP Restore to Nandroid bougt only black screen after 2nd vibration and ZUK logo.
I fixed the Test mode bug, by flashing the ZUI 1.9.104 ST Stock ROM via QPST.
After the phone was "repaired" I unlocked the bootloader, installed TWRP, made a nandroid backup of fully stock ROM and restored a nandroid backup from before the test mode problem.
The nandroid restore was successful, I rebooted the phone and it was "dead". Black screen, only rebooting (perioldy vibrating) there was no end, until the battery was empty.
I got no luck to reach any mode with tricky button pressing (vol+ pwr; vol- pwr; vol+ vol- pwr; usb in vol-) nor Windows detecting the phone. That's why I decided to remove the back glass cover, to got access to the battery.
Now I'm able to get the phone detected by my PC.
What I did: disconnect the battery, connect the phone to my computer, pressed the vol- button and connect the battery.
This made my PC able to detect the phone, but no I have an other problem. Windows only detects the phone as "unknown usb device (device descriptor request failed)". I don't know any way to install the driver....
Maybe anyone is able to help me or has any tip?
Thanks!
Cheers,
m_atze
Click to expand...
Click to collapse
What id shown in unknown device.
Like ven_9102&dev_1234
Maybe with editing quallcom drivers for your device id, you can still install it.
and if luck qpst can recognize it as qualcomm debug mod
Sent from my ZUK Z2121 using Tapatalk
eryenakgun said:
What id shown in unknown device.
Like ven_9102&dev_1234
Maybe with editing quallcom drivers for your device id, you can still install it.
and if luck qpst can recognize it as qualcomm debug mod
Sent from my ZUK Z2121 using Tapatalk
Click to expand...
Click to collapse
Hi,
Thanks for your quick response.
The Hardware ID: USB\DEVICE_DESCRIPTOR_FAILURE
"Error Message": This device has been stopped because it has reported errors. (Code 43)
An error occurred while requesting the USB device descriptor.
m_atze said:
I have a similar problem.
What caused the black screen? -
History:
I booted to test mode at 2.5.033 ST, the phone got stucked at this menue there was no way to get out. TWRP Restore to Nandroid bougt only black screen after 2nd vibration and ZUK logo.
I fixed the Test mode bug, by flashing the ZUI 1.9.104 ST Stock ROM via QPST.
After the phone was "repaired" I unlocked the bootloader, installed TWRP, made a nandroid backup of fully stock ROM and restored a nandroid backup from before the test mode problem.
The nandroid restore was successful, I rebooted the phone and it was "dead". Black screen, only rebooting (perioldy vibrating) there was no end, until the battery was empty.
I got no luck to reach any mode with tricky button pressing (vol+ pwr; vol- pwr; vol+ vol- pwr; usb in vol-) nor Windows detecting the phone. That's why I decided to remove the back glass cover, to got access to the battery.
Now I'm able to get the phone detected by my PC.
What I did: disconnect the battery, connect the phone to my computer, pressed the vol- button and connect the battery.
This made my PC able to detect the phone, but no I have an other problem. Windows only detects the phone as "unknown usb device (device descriptor request failed)". I don't know any way to install the driver....
Maybe anyone is able to help me or has any tip?
Thanks!
Cheers,
m_atze
Click to expand...
Click to collapse
Alright bro, there is one method you can try.
http://zukfans.eu/community/threads/howto-flash-a-stock-zui-rom-zuk-z2-pro-z2121-only.57/
I assume your phone is a brick now. The only method you can use is the 9008 unbrick mode. (AKA QBST)
There are a few things you need to prepare before you save ur phone. U need to download the require application that the website provided above, after you set everything up,
make sure you download the latest 2.5 QBST rom,
http://bbs.lenovomobile.cn/z2pro/t554654/
Because ur phone wont be able to enter 9008 through software, thus u need to do the following.
1. Load the content XML fille,
2.Turn off your phone. After it's fully shutdown
3. press and hold the volume up button for 3 seconds
4. press power button while hold the volume up (press it for 0.5second and keep holding it)
5. after 0.5 seconds, plug in the usb right away
6. the QFIL tool should appear the Qualcomm usb QD loader
7. the download button should turn blue
8. flash it and wait for reboot
OtakuLi said:
Alright bro, there is one method you can try.
http://zukfans.eu/community/threads/howto-flash-a-stock-zui-rom-zuk-z2-pro-z2121-only.57/
I assume your phone is a brick now. The only method you can use is the 9008 unbrick mode. (AKA QBST)
There are a few things you need to prepare before you save ur phone. U need to download the require application that the website provided above, after you set everything up,
make sure you download the latest 2.5 QBST rom,
http://bbs.lenovomobile.cn/z2pro/t554654/
Because ur phone wont be able to enter 9008 through software, thus u need to do the following.
1. Load the content XML fille,
2.Turn off your phone. After it's fully shutdown
3. press and hold the volume up button for 3 seconds
4. press power button while hold the volume up (press it for 0.5second and keep holding it)
5. after 0.5 seconds, plug in the usb right away
6. the QFIL tool should appear the Qualcomm usb QD loader
7. the download button should turn blue
8. flash it and wait for reboot
Click to expand...
Click to collapse
Thanks for your tip.
I followed your described procedure, but the phone will not be recocnized by the PC.
1st: I loaded QFIL XML file. (By the way this tut is made by me)
2nd: I disconnected the battery (The phone can't be turned off normally!)
3rd, 4th, 5th
6th: nothing happend!
7th: "-"
8th: "-"
The only way the phone will detected by the PC:
1st: disconnect battery
2nd: plug in USB (PC and Phone)
3rd: press VOL+ or VOL- or PWR button (doesn't matter which one)
4th: connect battery
5th: detected as "unknown usb device (device descriptor request failed)"
m_atze said:
Thanks for your tip.
I followed your described procedure, but the phone will not be recocnized by the PC.
1st: I loaded QFIL XML file. (By the way this tut is made by me)
2nd: I disconnected the battery (The phone can't be turned off normally!)
3rd, 4th, 5th
6th: nothing happend!
7th: "-"
8th: "-"
The only way the phone will detected by the PC:
1st: disconnect battery
2nd: plug in USB (PC and Phone)
3rd: press VOL+ or VOL- or PWR button (doesn't matter which one)
4th: connect battery
5th: detected as "unknown usb device (device descriptor request failed)"
Click to expand...
Click to collapse
Make sure you have to plug in the usb right away as soon as you u press power, and keep holding them
OtakuLi said:
Make sure you have to plug in the usb right away as soon as you u press power, and keep holding them
Click to expand...
Click to collapse
Yes, I did exactly you described. Sorry but this isn't working.
I don't know what I should do. Even a repair shop couldn't fix it.
Maybe I need to do this:
http://bbs.lenovomobile.cn/z2/t121791/?highlight=900e
But I don't want to destroy my PC (3000 bugs)
m_atze said:
Yes, I did exactly you described. Sorry but this isn't working.
I don't know what I should do. Even a repair shop couldn't fix it.
Maybe I need to do this:
http://bbs.lenovomobile.cn/z2/t121791/?highlight=900e
But I won't destroy my PC (3000 bugs)
Click to expand...
Click to collapse
oh well, good luck
OtakuLi said:
oh well, good luck
Click to expand...
Click to collapse
I will report the result.
OK. I made the deepflash cable.
After using it there is no difference between pressing one of the button combinations I recently mentioned (VOL+ or VOL- or PWR).
The phone will be detected as Unknown device. After intalling my modified driver to match the unknown ID, QFIL don't detect the COM Port.
Hello had the same problem, only with the difference that my battery was not completely discharged.
What has helped:
1 Start QFIL Tool
2 Press the volume +
3 Connect the original cable to the PC
4 QFIL Tool recognized the phone and I could play an original Rome.
Mfg
Ps. Is now the battery cover (glass) broken?
No, I used a hairdryer, a razorblade, plastic tool and a suction cup to lift the backcover glass.
The glass is fully intact no damages.
You have good nerves. I would not have expected that.
But in the end, it does not matter if it does not start anymore.
Thank you again for your great instructions for playing and rooting the mobile phone.
I hope you get your phone back.
Mfg
Good and bad news
The guy unbricked the phone successfully, I received it today.
Now I have an other problem:
The phone is very very slow and laggy now.
The problem occurs everywere, Recovery, boot (the bootlogo laggs), booted System, also the test mode laggs now
Furthermore the sceen flickers sometimes and at the right side the sceen is mirrored sometimes.
Did anyone has an idea?
What I did today:
reflash through qfil
1.9.104_ST
2.3.044_ST
ZUI_2.5.335_ST
Hi m_atze, I am exactly in the same situation as You. After using deep flash cable method, I got "unknown usb device (device descriptor request failed)". Could You tell me what was the solution to unbrick the phone?

Blue Light flash

Hey all,
I have Zuk z2pro z2121. I wanted more than stock ROM so I downloaded zui 2.5.344. I unlocked bootloader n rooted my phone as well as installed TWRP. "Tool All in one" PC software helped me to carry out above with ease.
While playing around I clicked "Lock Bootloader" and phone got switched off with indicating continuous blue light. I tried pressing vol down + power + Home button, and several other combination but didn't help. When I pressed power button for long, I got Zuk logo onscreen with a white flash on indicator for 1 sec and then again the blue light indicator.
After a little RnD after pressing power button till I got white flash for 3 times and the blue light got completely off. I don't know what to do further. I have backup of my boot , recovery and ROM. Kindly suggest.
Shoaib
Press and hold volume - and power . Release power, after vibration you can release the volume -. You will be in that menu https://ibb.co/f3vOHm . Go to device manager and check if pc recognize your phone https://ibb.co/bHqZOR . Open CMD in adb folder and write adb devices https://ibb.co/cwCg3R . Then adb reboot edl . You are i EDL https://ibb.co/cvjiHm . Use Qfil to flash stock rom
Didn't work...
Thanks for responding. As said, tried pressing Vol + Power and never got any vibrations. Tried Up vol + power, tried Down vol + power. No vibrations.
When I press power button with any combination, this is what happens,
After Approx 15 secs - 1 white light flash in place of blue along with ZUK pic on d display (stays approx 1 sec)
Still keeping power button pressed
After approx 7-8 secs - same as above
Still keeping power button pressed
After Approx 15 secs - 1 white light flash in place of blue along with ZUK pic on d display (stays approx 1 sec)
But now after this third time of flash, blue light appears and after 4-5 secs disssappears. If I leave the button only at this time, the blue light doesn't comes back.
If I leave the power button before or after this sequence, the blue light doeanon the indicator doesn't goes off at all.
What is happening when you connect phone with pc ? Is there any reaction ?
No reaction from PC.
I tried connecting to PC, earlier Tool all in one immediately use to detect, n now there is no response from the PC or the software after making USB connection.
Sir,
As I said earlier, I clicked lock bootloader, n when the screen went off, I disconnected the phone from PC. There is a possibility of the boot partition getting damaged or so. Kindly assist.
Rgds
There aren't any ways to enter in fastboot or recovery , even in service menu . I think you should try deep flash cable to enter in EDL .
Will do as u say. Just one last thing, when I checked device manager in my PC, it showed the phone as other devicez "QUSB XXXX". Question is,
1. Any possibilities of recovery without going for a deep flash, as I got to learn it first.
2. Other part is, my phones battery seems to be drained now. So, it won't be a problem for a deep flash.
Could you give some print screen ?
The matter is that you must switch your phone to edl . Try this yet . Your phone must be turn off .
Press only volume up button for 10 sec and while keeping it pressed,connect phone to PC . Hold volume up until your PC finds a new hardware . It should be android phone - ShenQi composite adb interface . If it doesn't work I have no more ideas apart from df cable . This cable works on Zuk z2 and I think it should works on our Zuk z2 pro
Sir,
I managed to connect the phone via USB as 9008. Miflash not supporting my ROM. Will download Stock ROM n then try with QFIL and MiFlash as well. Thanks for all your support. Will keep u posted about the progres. XML file is not found in any ROMs I have. Miflash some error also but detecting the device. Is there any other tool similar to Miflash, which I can try..
Rgds
First use QPST/Qfil . Follow this guide https://zukfans.eu/community/threads/howto-flash-a-stock-zui-rom-zuk-z2-pro-z2121-only.57/
Do all steps .
Good day.
I tried QFIL as well as Mi flash tool. Both showing errors. QFIL displaying Qualcomm HS USB QLoader 9008. But when downloading content , it shows Sahara error with even initiating the installation. After browsing a bit, started eMMC software download, and found displaying COM20 No phone connected. Can u assist me to fix this. I mean the phone must be in download mode. But how ?
Miflash, on the other hand shows Hello packet error. Don't know how to fix.
Things I did to fix above errors,
1. Copied ROM to Qualcomm/ bin file
2. Copied ROM to C:/
3. Tried using different USB ports
4. Tried different USB cables
5. Uninstalled n reinstalled USB driver, adb n fastboot, qpst, n miflash many a times along with restarting my PC.
None of the above helped.
I think, if eMMC software download starts displaying COM20 Phone connected, then the issue might be sorted out.
Kindly assist.
Rgds
DrTahseen said:
Good day.
I tried QFIL as well as Mi flash tool. Both showing errors. QFIL displaying Qualcomm HS USB QLoader 9008. But when downloading content , it shows Sahara error with even initiating the installation. After browsing a bit, started eMMC software download, and found displaying COM20 No phone connected. Can u assist me to fix this. I mean the phone must be in download mode. But how ?
Miflash, on the other hand shows Hello packet error. Don't know how to fix.
Things I did to fix above errors,
1. Copied ROM to Qualcomm/ bin file
2. Copied ROM to C:/
3. Tried using different USB ports
4. Tried different USB cables
5. Uninstalled n reinstalled USB driver, adb n fastboot, qpst, n miflash many a times along with restarting my PC.
None of the above helped.
I think, if eMMC software download starts displaying COM20 Phone connected, then the issue might be sorted out.
Kindly assist.
Rgds
Click to expand...
Click to collapse
U need ufs flash not emmc. Change programmer in qfil.
I have a some experience with miflash but I use it for xiaomi . I've never flashed my zuk z2 pro by miflash . If you want to use miflash use 2016.03.30 and run it on PC with win 64 . Create a folder on c: for example "zuk" and copy to that all contents of unrar Qpst/Qfil zui rom . If you have Qualcomm hs usb 9008 that means your phone is in edl ( download mode ) . Good luck
I appreciate all ur support....
As suggested, tried Miflash 30.03.2016 also. This ones showing class not registered.
No of things i did to overcome this errors.
1. Changed my PC to developer mode. Allowed portable device connections n stuff.
2. Visual studio C++ 2010 was installed along with Qualcomm driver, i believe thats sufficient.
3. Disabled my Firewall.
4. Downloaded n copied some atl70.dll file to my syswow64 folder as well as sys32 folder.
Tried all flash tools again after these changes....Same negative results.
Any further advices !!!
Regards
It's fault of drivers . Go to device manager and chose qualcomm hs usb 9800 and update driver automaticly . The second matter concerning of flashing by qpst/qfil - why did you put rom in qpst location ? . It must be for example on desktop in one folder . The simplest path is better . Don't use spacebar . Load content you must chose from that rom . Don't use other location . It's not necessary . Could you give some screenshots with qfil errors
DrTahseen said:
I appreciate all ur support....
As suggested, tried Miflash 30.03.2016 also. This ones showing class not registered.
No of things i did to overcome this errors.
1. Changed my PC to developer mode. Allowed portable device connections n stuff.
2. Visual studio C++ 2010 was installed along with Qualcomm driver, i believe thats sufficient.
3. Disabled my Firewall.
4. Downloaded n copied some atl70.dll file to my syswow64 folder as well as sys32 folder.
Tried all flash tools again after these changes....Same negative results.
Any further advices !!!
Regards
Click to expand...
Click to collapse
Did u use ufs flash in qfil instead of emmc?
Starchm said:
Did u use ufs flash in qfil instead of emmc?
Click to expand...
Click to collapse
Yups !!! I already did with Meta Build Type selection. Didnt Help. I tried to search for mbn file also to try emmc but cudnt find so was stuck with ufs....
mar.ur said:
It's fault of drivers . Go to device manager and chose qualcomm hs usb 9800 and update driver automaticly . The second matter concerning of flashing by qpst/qfil - why did you put rom in qpst location ? . It must be for example on desktop in one folder . The simplest path is better . Don't use spacebar . Load content you must chose from that rom . Don't use other location . It's not necessary . Could you give some screenshots with qfil errors[/QUOTE
https://forum.xda-developers.com/attachment.php?attachmentid=4339940&stc=1&d=1511421690
https://forum.xda-developers.com/attachment.php?attachmentid=4339941&stc=1&d=1511421690
https://forum.xda-developers.com/attachment.php?attachmentid=4339942&stc=1&d=1511421690
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