[Q] Boot loop for no reason - Windows Phone 8 Q&A, Help & Troubleshooting

I left my Lumia 928 charging on the wall for the night and first thing in the morning while taking it off I noticed it was stuck in a boot look at the "NOKIA" screen. Seems like bootloader got corrupted for no good reason.
I can make it start Flash mode though and also Mass Storage mode with WP Internals.
Is there some way I can restore boot other than flashing original firmware and losing all my data???
Any help attempt is appreciated

I have just got this problem on my lumia 730. I have used Windows Recovery Tools to repair my phone. connect your phone to your computer by a USB cable. open WRT, if it don't detect your phone, hit the button My phone was not detected, choose your your device family and press power button + volume down button until it detected. if this doesn't work, try it again or you can use Nokia Recovery Tools. Hope this work for you

giahuy2201 said:
I have just got this problem on my lumia 730. I have used Windows Recovery Tools to repair my phone. connect your phone to your computer by a USB cable. open WRT, if it don't detect your phone, hit the button My phone was not detected, choose your your device family and press power button + volume down button until it detected. if this doesn't work, try it again or you can use Nokia Recovery Tools. Hope this work for you
Click to expand...
Click to collapse
Yes, I am probably going that way. Thing is I wanted to retrieve some data in the phone first. I managed to enter flash and mass-storage modes. But can only acces system files in mass-storage mode

Related

Cannot Access Android Recovery Mode - Xperia Z1

I have two Xperia Z's , Z1(a) - Display is jet black and sim port broken but phone and touch still function as normal. Bought another broken screen Z1(b) - recovered motherboard to replace Z1a. That worked but now Z1b stuck on pattern screenlock and ebay seller does not want to give me password. I have the old screen with fingerprint smudges and everyday I attempt to crack the pattern lock and phone not blocked as i put sim in and able to call phone and answer..
I have tried connecting Z1b to PC to use Sony Update Service software to restore phone back to factory setting but phone is not recognised or charging by PC (does charge through wall socket and Mac USB port). Run SUS>Press Vol Down Button while connecting USB and LED indicates GREEN then RED but software cannot find phone.
{{Run SUS>Press Vol Up Button while connecting USB and LED indicates solid BLUE LED - not sure what this feature is???}}
So I exchange Z1b motherboard with Z1a and when connected to PC, phone indicates charging and installs a driver to PC. Do a dummy SUS test and phone is found by software allowing option to do a factory reset. Re-exchange back Z1b and still nothing - no charge, not recognised by PC or software - so assume Z1b usb port is faulty.
So read about Android recovery mode but i cannot access recovery mode on either of them - Is recovery mode only available for rooted android phones??? I can only enter safe mode (Power+VolDown) and tried the following options but got no response:
1. Holding Power + VolUp
2. Pressing Vol Up continuously after pressing power button
3. Pressing Vol Down continuously after pressing power button
4. Press all Buttons together.
NEXT STEPS:
1.Connect Z1b to a MacOS 10.6 or later and try SUS and PC companion (i have old Mac 10.4)
Any other help or suggestion??? - many thanks in advance.
Have you installed a recovery?
If not then you cant access something that your phone does not have
You will have to root and install one, just follow the link in my signature to get root on latest KK firmware
PS, wrong section, but I have asked the mods to move it for you
Thanks for your reply.
I thought this was a built in feature on android devices - guess am wrong. I will not be able to install anything if i cannot access phone OS.
Looks like i will have to see if i can reset Z1b through Mac Sony bridge SUS, cough up for USB repair OR by chance crack code.
or just read some "how to" / "Tutorial" / "guides" threads to install recovery. Its very easy.

[Q] Lumia 720 in boot loop - nokia logo and gears after install WPreview 10 - 10149

Hi Folks,
I need a help in my lumia 720, I was using W 10 in my phone without problems but while the upgrade to 10149 the phone begin a looping nokia logo and gears.
I tried use differents pc, none detected my phone, with differs usb cable , and I tried some of solutions as Nokia care suite, WPRT, Lumia recovery tool, command using thor2.
All times my phone not detected. Someone have the same problem ? and have a fix ? or any idea to solve ?
Best regards
Hi @fccom,
You have tried with undetected phone option (in bottom) in WPRT?
Yes, into nokia care suite, lumia recovery tool too.
Are you able to boot your Lumia device in FFU DL Mode?
Here is the procedure:
Khaagan said:
Press and hold the power button to start your Lumia device.
When your Lumia device starts, it displays the Microsoft or Nokia logo. At this instant, release the power button, then press and hold the volume up button. This step should be done quickly.
After a few seconds, an image composed of a white lightning and a white gear wheel appear on the screen of your Lumia device. At this instant, release the volume up button.
Click to expand...
Click to collapse
Yes I tried , but in this step I recieved a error , later I will post the error , but was something about connection
My phone is recognized as unknow device error code 43
"the use this command line
Code:
thor2 -mode emergency -hexfile HEX.hex -mbnfile msimage.mbn -orig_gpt
Ready, disconnect the battery and reconnect. Now connect your phone to the PC
Yeah, his phone started life with red screen!
Charge the battery"
Do you have other idea to solve conection with pc , and hard reste ?
Thanks
fccom said:
Do you have other idea to solve conection with pc , and hard reste ?
Thanks
Click to expand...
Click to collapse
HI, I had the same on my Lumia 930, keeping rebooting on gears.....
It works with lumia recovery and trying with the vol down + power. But it wasn't the first time.... i needed 3 or 4 tries.
The Pc detected the phone ?
Because my lumia ever is recognized with unknow device.
fccom said:
Hi Folks,
I need a help in my lumia 720, I was using W 10 in my phone without problems but while the upgrade to 10149 the phone begin a looping nokia logo and gears.
I tried use differents pc, none detected my phone, with differs usb cable , and I tried some of solutions as Nokia care suite, WPRT, Lumia recovery tool, command using thor2.
All times my phone not detected. Someone have the same problem ? and have a fix ? or any idea to solve ?
Best regards
Click to expand...
Click to collapse
It happened to me too..... just use the windows phone image designer by following the tutorial of @Khaagan It recovered my phone
souma_rox said:
It happened to me too..... just use the windows phone image designer by following the tutorial of @Khaagan It recovered my phone
Click to expand...
Click to collapse
my problem is my phone not detected ....
this step fail
Booting your Lumia device
To continue this tutorial, it is necessary to boot your Lumia device in the Microsoft FFU Download Mode. To do so, follow the five steps mentioned below:
Turn off your Lumia device.
Press and hold the power button to start your Lumia device.
When your Lumia device starts, it displays the Microsoft or Nokia logo. At this instant, release the power button, then press and hold the volume up (+) button. This step should be done quickly.
After a few seconds, an image composed of a white lightning and a white gear wheel appear on the screen of your Lumia device. At this instant, release the volume up (+) button.
Connect your Lumia device at your PC, this one should simply detect it.
fccom said:
my problem is my phone not detected ....
this step fail
Booting your Lumia device
To continue this tutorial, it is necessary to boot your Lumia device in the Microsoft FFU Download Mode. To do so, follow the five steps mentioned below:
Turn off your Lumia device.
Press and hold the power button to start your Lumia device.
When your Lumia device starts, it displays the Microsoft or Nokia logo. At this instant, release the power button, then press and hold the volume up (+) button. This step should be done quickly.
After a few seconds, an image composed of a white lightning and a white gear wheel appear on the screen of your Lumia device. At this instant, release the volume up (+) button.
Connect your Lumia device at your PC, this one should simply detect it.
Click to expand...
Click to collapse
It will detect the phone It shows the phone name difeerent like noki6915.366 bla bla bla. just select the .ffu image file and press flash
fccom said:
my problem is my phone not detected ....
this step fail
Booting your Lumia device
To continue this tutorial, it is necessary to boot your Lumia device in the Microsoft FFU Download Mode. To do so, follow the five steps mentioned below:
Turn off your Lumia device.
Press and hold the power button to start your Lumia device.
When your Lumia device starts, it displays the Microsoft or Nokia logo. At this instant, release the power button, then press and hold the volume up (+) button. This step should be done quickly.
After a few seconds, an image composed of a white lightning and a white gear wheel appear on the screen of your Lumia device. At this instant, release the volume up (+) button.
Connect your Lumia device at your PC, this one should simply detect it.
Click to expand...
Click to collapse
If you have done all the previous steps coorectly it should look like this.. It may give error once or twice during flashing between 15%-60% dont't worry just close the software and reopen it. Then remove battery from ur phn re-enter it anen it in download mode and start flashing again..... dont panic
souma_rox said:
If you have done all the previous steps coorectly it should look like this.. It may give error once or twice during flashing between 15%-60% dont't worry just close the software and reopen it. Then remove battery from ur phn re-enter it anen it in download mode and start flashing again..... dont panic
Click to expand...
Click to collapse
My phone not is detected, I did the change in pc settings, install lumiaflashingtool but nothing, I tried with 2 pcs , still show unknow device.

Phone locked at logo boot, usb debugging disabled

Hi all,
I rooted my phone and unclocked bootloader.
My rom is a stock rom.
I managed to install CWM recovery using lg-optimus-4xhd-recovery-v1.0.apk but something happened.
I rebooted my phone in recovery mode and it is always locked to LG logo.
Pressing Volume up and power I can see normal android system recovery, wiping cache and factory reset don't work.
I haven't usb debugging enable so my computer can't see the phone connected with usb cable, and it's impossible for me flashing the phone with kdz rom methods.
What can I do?
Thx in advance for your answers
No one can help me?
Flashing with kdz results in "phone was not found", is there a way to resolve? I've tried with ubuntu, OS (adb) only see my phone if usb debugging is enabled and it isn't, and with a laptop running win8, installing LG drivers and so on, nothing works.
This is salvagable
If you can get the stock recovery mode, all is not lost, all of the important bits are still functioning.
Power down. Hold VolDn and insert the USB cable. If you get the Software Update screen with a green icon you CAN recover the phone. It may require a battle with Windows to get it to play nice, Windows and USB is always a hit or miss affair; but the phone is ok if that screen appears. Do not use the VolUP + Power LG Recovery mode, there isn't a known tool for that in the wild.
I don't normally run Windows and the couple of times I have booted it to do this it required some hassle and usually skipping the nice way since I had never installed the bundled LG Desktop stuff before things went wrong. So just do what I did, pick the Emergency mode that requires inputting the IMEI instead of letting it detect your phone and then let it fix things for you.
jmorris_42 said:
If you can get the stock recovery mode, all is not lost, all of the important bits are still functioning.
Power down. Hold VolDn and insert the USB cable. If you get the Software Update screen with a green icon you CAN recover the phone. It may require a battle with Windows to get it to play nice, Windows and USB is always a hit or miss affair; but the phone is ok if that screen appears. Do not use the VolUP + Power LG Recovery mode, there isn't a known tool for that in the wild.
I don't normally run Windows and the couple of times I have booted it to do this it required some hassle and usually skipping the nice way since I had never installed the bundled LG Desktop stuff before things went wrong. So just do what I did, pick the Emergency mode that requires inputting the IMEI instead of letting it detect your phone and then let it fix things for you.
Click to expand...
Click to collapse
Many thanks for your answer, I resolved the problem late at night, yes, after a hard battle with windows.
I installed windows 7 32 bit, I tried a lot of Lg drivers, 3.8.1 maybe the best, after inserting the USB cable with SW Update screen some LG peripherals were recognized but the result in KDZ_FW_UPD was always "phone was not found", then I tried connecting USB cable with the Phone in Android recovery mode ( power & Vol up), and OS added a couple more peripherals, and attempting again with SW Upgrade mode worked.

Can't enter in flash mode

Hello to all,
I would like to install a custom ROM but unfortunately my phone doesn't want to enter in flash mode! Once switched off, I plug it to my computer while keeping vol down button pressed but instead of entering in flash mode, it displays the battery charging icon.
I hard reset the phone but the problem still remains. Any idea.
Thanks, have a nice day!
My guess is either the USB cable (did you use the OEM cable?) or the drivers (does windows recognize your phone?). Removing the SD card or first entering recovery were suggested earlier (http://forum.xda-developers.com/xperia-l/help/update-volume-connect-doesnt-t2613733). But more experiences Z3c owners may have better ideas...
Kholargol said:
Hello to all,
I would like to install a custom ROM but unfortunately my phone doesn't want to enter in flash mode! Once switched off, I plug it to my computer while keeping vol down button pressed but instead of entering in flash mode, it displays the battery charging icon.
I hard reset the phone but the problem still remains. Any idea.
Thanks, have a nice day!
Click to expand...
Click to collapse
Using flashtool:
Turn phone off completely.
Start flashtool, choose flashmode and choose which firmware you are going to use. Tick Exclude TA.. Click on flash.
It will start preparing the build and after a few seconds it will ask you to connect the phone.
Plug the phone in while holding volume down, as soon as flashtool starts doing something, you can let go.
If you don't know how to use flashtool then I urge caution, Sony's aren't like flashing a Samsung, it is actually possible to brick your phone with flashtool. There are lots of questions on 'how do I fix my phone?' in this Q&A thread from people who didn't read up on what they were doing.
Recommend you read bilboa1's great guide on what to do, starting with backing up your TA partition..
Thanks for your answers but I think the mini usb from my phone must be dead.
About Flashtool, I can't use it because I can't go into Flash mode! Moreover, my phone is not recognized by windows. I tried with several usb cables and computers when I plug it, I don't have any MTP or PTP choice, it can only charge..
On Windows 10, devices is not recognized and Window 7 see it as a 5880!
And I tried to remove SD and SIM cards..
Kholargol said:
Thanks for your answers but I think the mini usb from my phone must be dead.
About Flashtool, I can't use it because I can't go into Flash mode! Moreover, my phone is not recognized by windows. I tried with several usb cables and computers when I plug it, I don't have any MTP or PTP choice, it can only charge..
On Windows 10, devices is not recognized and Window 7 see it as a 5880!
And I tried to remove SD and SIM cards..
Click to expand...
Click to collapse
If the USB lead was dead you wouldn't get the charging icon on your phone.
Have you installed the Sony drivers.
You also need to run exe in the Drivers folder within Flashtool, to make sure you have correct flashomde drivers available. Installing these drivers is very difficult in Windows 10 and it require restarting the machine in safe mode, and going into the advanced settings to disable driver signature checking, this how to video is for windows 8, but you'll get the idea
Have you installed ADB?
Sonys PC Companion should set you up with the correct connection to your PC
Have you tried other USB cables?
Didgesteve said:
If the USB lead was dead you wouldn't get the charging icon on your phone.
Have you installed the Sony drivers.
You also need to run exe in the Drivers folder within Flashtool, to make sure you have correct flashomde drivers available. Installing these drivers is very difficult in Windows 10 and it require restarting the machine in safe mode, and going into the advanced settings to disable driver signature checking, this how to video is for windows 8, but you'll get the idea
Have you installed ADB?
Sonys PC Companion should set you up with the correct connection to your PC
Click to expand...
Click to collapse
Yes, I've installed PC Companion, adb drivers but nothing appears when I use command "adb devices". I've also installed flashtools drivers but deactivating drivers signatures in Windows. But when I try to flash, flashtool ask me to turn my device in flash mode (switch off then volume down + power) but I can't do that.
I've tried several usb cables. Some are charging my devices, some are aren't but none of them allows me to data transfer!
I've also tried to force MTP or PTP usb transfer in developper option, it doesn't work more..
Kholargol said:
Yes, I've installed PC Companion, adb drivers but nothing appears when I use command "adb devices". I've also installed flashtools drivers but deactivating drivers signatures in Windows. But when I try to flash, flashtool ask me to turn my device in flash mode (switch off then volume down + power) but I can't do that.
I've tried several usb cables. Some are charging my devices, some are aren't but none of them allows me to data transfer!
I've also tried to force MTP or PTP usb transfer in developper option, it doesn't work more..
Click to expand...
Click to collapse
Do you have any warranty on your phone, you could be right that the usb socket is damaged somehow, but it's strange that you can still get a charge through it.
Your only chance at moving to a custom rom change is flashfire
This should let you flash a rom without recovery.
Edit: Flashmode is just holding down just - volume button, not volume+power
Obviously your chances of rescuing a failed install are going to almost zero without recovery and flashtool, so be very very careful about what you try and flash in flashfire. Read up completely that the rom you want to flash is going to work pushed on top of whatever you are running at the moment.
For anyone who might be interested, sometimes you have to try a USB 2.0 port or just a different port. I had the same problem while using a usb 3 port, switched to 2.0 worked like a charm.
Try to open the back of the phone and removing/unplugging the battery wait 5 seconds and then put it in again. Then try holding down the volume down button while you connect a usb cable.
sir i have sony e3 dual and wanted to flash a custom rom . i connected it to pc but a
Ertert24 said:
Try to open the back of the phone and removing/unplugging the battery wait 5 seconds and then put it in again. Then try holding down the volume down button while you connect a usb cable.
Click to expand...
Click to collapse
sir i have sony e3 dual and wanted to flash a custom rom . i connected it to pc but after the original firmware was deleted i got to know that my phone volume down button isnt working. anyone please tell me how to put my phone in flashmode without pressing volume down button as it is not working

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?

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