My phone can't boot because of flashing wrong firmware - Sony Xperia XZ3 Questions & Answers

I flashed the XZ2C firmware to XZ3, and now I can't turn on the phone, and I can't connect the bootloader because the blue light can't light up. But the green light is still on. Is there any way I can save my phone?

Priterms said:
I flashed the XZ2C firmware to XZ3, and now I can't turn on the phone, and I can't connect the bootloader because the blue light can't light up. But the green light is still on. Is there any way I can save my phone?
Click to expand...
Click to collapse
Volume up button should give you a blue light so you can use ADB to flash stuff (like TWRP and use a backup from someone or perhaps a rom if any) and volume down gives you a green light which is needed when flashing a firmware with flashtool or Xperia tool (forgot the name)
You should also try the official Xperia Companion

darkness4every1 said:
Volume up button should give you a blue light so you can use ADB to flash stuff (like TWRP and use a backup from someone or perhaps a rom if any) and volume down gives you a green light which is needed when flashing a firmware with flashtool or Xperia tool (forgot the name)
You should also try the official Xperia Companion
Click to expand...
Click to collapse
The companion should work and do a Software repair, but its a full wipe to OOTB status so make sure you back everything up

Related

[Q] Xperia Z possible brick

After searching around I couldn't find anything related so here's my problem.
After succesfully unlocking the bootloader of my Xperia Z it continues to work fine.
It prompted the initial startup screen (enter language, account info ect.)
I turned my device off and on... this is where the problem starts..
This is what i get
Sony brand logo>
Xperia brand logo>
5 repeated cloud animation of xperia logo and at the last one it stalls, Phone reboot and back to 0.
This goes on repeatedly until a hard poweroff or complete discharge ( I suppose)
So I know im kinda screwed, is relocking the bootloader any option? Contacting Sony atm for some sort of software replacement/flash anything..
Cheers, Geert
Try the safe mode,keep pressing vol down with power until the phone boot completely.
If the phone boot to safe mode than do a factory reset.
Sent from my C6602 using xda premium
GeertNool said:
After searching around I couldn't find anything related so here's my problem.
After succesfully unlocking the bootloader of my Xperia Z it continues to work fine.
It prompted the initial startup screen (enter language, account info ect.)
I turned my device off and on... this is where the problem starts..
This is what i get
Sony brand logo>
Xperia brand logo>
5 repeated cloud animation of xperia logo and at the last one it stalls, Phone reboot and back to 0.
This goes on repeatedly until a hard poweroff or complete discharge ( I suppose)
So I know im kinda screwed, is relocking the bootloader any option? Contacting Sony atm for some sort of software replacement/flash anything..
Cheers, Geert
Click to expand...
Click to collapse
Welcome to XDA
you should go to the recovery thread in my signature. Read the first 2 posts.
Hope you recover your phone.
Hi everyone !
I have the same problem as GeertNool. My Xperia is stuck in the same loop. I have tried everything.
- Flashboot : stuck at 0% when i try to flash
- Pc Companion and SEUS = dead ends
- Safe mode : cant make it work
I read the recovery thread. It seems that the Kernel is malfunctioning but i dont understand what should be my next move. Am i supposed to let the phone reboot endlessly untill eventually the battery dies ?
Thanks a lot for your precious answers.
Alex
al3xwhite said:
Hi everyone !
I have the same problem as GeertNool. My Xperia is stuck in the same loop. I have tried everything.
- Flashboot : stuck at 0% when i try to flash
- Pc Companion and SEUS = dead ends
- Safe mode : cant make it work
I read the recovery thread. It seems that the Kernel is malfunctioning but i dont understand what should be my next move. Am i supposed to let the phone reboot endlessly untill eventually the battery dies ?
Thanks a lot for your precious answers.
Alex
Click to expand...
Click to collapse
Yes.
When the battery dies the phone should reset itself.
After the loops end plug into a charger, not pc for now.
You should get a red led indicating low battery level charging is working.
After the red led you may get Sony boot screen or bootloops.
If you get Sony and then the charging battery icon, then charge to over 50%. Then use pc companion or flashtool to restore.
If you get bootloops then read my 2nd post from the recovery thread in my signature for bootloop tricks.
Please let me know if it works. I am looking to add the Xperia Z to my recovery guide.
If there are any questions about my guide please ask in that thread.
Thanks
From Jaramie's LT28at
Try this: hold power and VolUp for about 15 seconds. The device should vibrate 3 times in a row. It should now be off. Don't plug it in anywhere.
Download the correct flashtool beta for xperia z http://forum.xda-developers.com/showthread.php?t=2162907
Download a known-to-work firmware ftf
Put it into C:\Flashtool\Firmwares
Open flashtool (flashtool64 if you run 64bit Windows)
Chose Flash (flash arrow button)
Chose the ftf you downloaded
Enable "Wipe: Data, Cache, Appslog"
Click flash
A new window opens with a "press back button" animation
Now plug in the device while ONLY holding VolDown. Only VolDown, no Power. The LED should turn green.
Don't interrupt the flashing process. It will take a while.
Report back if it worked.
after flashing rom my xperia is booting until the lock screen appears then it resets. what should i do? thanks
vaud27 said:
after flashing rom my xperia is booting until the lock screen appears then it resets. what should i do? thanks
Click to expand...
Click to collapse
Did you flash it with flashtool?
Did you enabled "Wipe: Data, Cache, Appslog.?
Sent from my C6602 using xda premium
gm007 said:
Did you flash it with flashtool?
Did you enabled "Wipe: Data, Cache, Appslog.?
Sent from my C6602 using xda premium
Click to expand...
Click to collapse
i use cwm to flash it. i wipe everything. after flashing the recovery disappear and my xperia keeps on rebooting after reaching the lock screen.
can i reflash it using flashtool even my usb debugging is off?
vaud27 said:
i use cwm to flash it. i wipe everything. after flashing the recovery disappear and my xperia keeps on rebooting after reaching the lock screen.
can i reflash it using flashtool even my usb debugging is off?
Click to expand...
Click to collapse
Something wrong with the rom you are trying to install.
Yes you can use flashtool even if usb debugging is off.
Check schaggo post up^^^^
Sent from my C6602 using xda premium
gm007 said:
Something wrong with the rom you are trying to install.
Yes you can use flashtool even if usb debugging is off.
Sent from my C6602 using xda premium
Click to expand...
Click to collapse
i will try to flash it using flashtool. thanks for your help mate
had the same problem and i managed to fix it just showing sony sign by installing the sony update programme on the sony update website
all you do is put phone into flashboot mode.
on mine i had to hold up and power button untill it vibrates 3 times then press down volume button to get it into flashboot mode
takes a few atempts but it worked.
takes around 20 mins to download then install another 10.
i couldnt get flashtool to flash firmware as my phone is locked on 3 mobile firmware locked bootloader
i hope this helps you
update:
schaggo method works. i can breath now. thanks to @gm007
This worked great for unbricking mine !!
P.S. don't waste time for Sony's Emma flash, they do not send login credentials in real time, site says they do manual user validation ...
schaggo said:
Try this: hold power and VolUp for about 15 seconds. The device should vibrate 3 times in a row. It should now be off. Don't plug it in anywhere.
Download the correct flashtool beta for xperia z http://forum.xda-developers.com/showthread.php?t=2162907
Download a known-to-work firmware ftf
Put it into C:\Flashtool\Firmwares
Open flashtool (flashtool64 if you run 64bit Windows)
Chose Flash (flash arrow button)
Chose the ftf you downloaded
Enable "Wipe: Data, Cache, Appslog"
Click flash
A new window opens with a "press back button" animation
Now plug in the device while ONLY holding VolDown. Only VolDown, no Power. The LED should turn green.
Don't interrupt the flashing process. It will take a while.
Report back if it worked.
Click to expand...
Click to collapse
AW: [Q] Xperia Z possible brick
racht said:
...don't waste time for Sony's Emma flash, they do not send login credentials in real time...
Click to expand...
Click to collapse
They never will. Read the instructions which come with EMMA. I have it working fine, officially, without any credentials.
flashtool not flash the phone
schaggo said:
Try this: hold power and VolUp for about 15 seconds. The device should vibrate 3 times in a row. It should now be off. Don't plug it in anywhere.
Download the correct flashtool beta for xperia z http://forum.xda-developers.com/showthread.php?t=2162907
Download a known-to-work firmware ftf
Put it into C:\Flashtool\Firmwares
Open flashtool (flashtool64 if you run 64bit Windows)
Chose Flash (flash arrow button)
Chose the ftf you downloaded
Enable "Wipe: Data, Cache, Appslog"
Click flash
A new window opens with a "press back button" animation
Now plug in the device while ONLY holding VolDown. Only VolDown, no Power. The LED should turn green.
Don't interrupt the flashing process. It will take a while.
Report back if it worked.
Click to expand...
Click to collapse
I have the same issue here, the phone suddenly dead. Charge it using AC adaptor and wall socket and the red led flashs for about 2 hours, the orange LED never turns on. Try your advice and got this:
1) Vol up + Power not work (no vibration, nothing)
2) Flash with flashtool 0.9.10.2 beta6 with no lucky, indicated "device disconnected" after animation gone.
3) regress to flashtool 0.9.10.1, device connected and then stuck at "flashing data.....", the progress bar stay at 0% and then nothing.
P.S. bootloader is still locked but phone is ROOTED so I'm affraid it's out of warranty. Just got the phone as a birthday gift from my wife yesterday! She'd kill me if she knows that.
Update:
1) Power + Vol Up works now. The sequence does matter, I found I have to press the Power button first and then Vol Up, it dosen't work vise versa.
2) flashing still doesn't work for me. And I noticed that the LED turn green and then turn off immediately. I'm not sure if that is the cause. I'm sure when in fastboot mode (connect to USB port when pressing Vol Up), the LED turn blue and stay blue. Is my flash mode corrupted?? That's really bad!
[email protected] said:
I have the same issue here, the phone suddenly dead. Charge it using AC adaptor and wall socket and the red led flashs for about 2 hours, the orange LED never turns on. Try your advice and got this:
1) Vol up + Power not work (no vibration, nothing)
2) Flash with flashtool 0.9.10.2 beta6 with no lucky, indicated "device disconnected" after animation gone.
3) regress to flashtool 0.9.10.1, device connected and then stuck at "flashing data.....", the progress bar stay at 0% and then nothing.
P.S. bootloader is still locked but phone is ROOTED so I'm affraid it's out of warranty. Just got the phone as a birthday gift from my wife yesterday! She'd kill me if she knows that.
Update:
1) Power + Vol Up works now. The sequence does matter, I found I have to press the Power button first and then Vol Up, it dosen't work vise versa.
2) flashing still doesn't work for me. And I noticed that the LED turn green and then turn off immediately. I'm not sure if that is the cause. I'm sure when in fastboot mode (connect to USB port when pressing Vol Up), the LED turn blue and stay blue. Is my flash mode corrupted?? That's really bad!
Click to expand...
Click to collapse
Try sony update service or remove flashtool and install again and use another firmware(maybe the first one is corrupted).
Sent from my C6603 using xda premium
[email protected] said:
P.S. bootloader is still locked but phone is ROOTED so I'm affraid it's out of warranty. Just got the phone as a birthday gift from my wife yesterday! She'd kill me if she knows that.
Update:
1) Power + Vol Up works now. The sequence does matter, I found I have to press the Power button first and then Vol Up, it dosen't work vise versa.
2) flashing still doesn't work for me. And I noticed that the LED turn green and then turn off immediately. I'm not sure if that is the cause. I'm sure when in fastboot mode (connect to USB port when pressing Vol Up), the LED turn blue and stay blue. Is my flash mode corrupted?? That's really bad!
Click to expand...
Click to collapse
It probably means your battery was low.
From my Xperia LT28at ION
gm007 said:
Try sony update service or remove flashtool and install again and use another firmware(maybe the first one is corrupted).
Sent from my C6603 using xda premium
Click to expand...
Click to collapse
Thanks for response. Finally flashtool 0.9.10.1b works for me!
Returning to stock
Hey guys,
I've flashed [ROM][JB 4.2.2][CM10.1][AOKP-MR1][PananoidAndroid 3.15] PAC v22.1.1 - Update: 0508 from http://forum.xda-developers.com/showthread.php?t=2208249&page=65. It's working, but I'd like to try another ROM, specifically Xperia Z Revolution™ from http://forum.xda-developers.com/showthread.php?t=2175903. This requires to install stock 10.1.A.1.434 firstly So I downloaded C6603_10.1.A.1.434_Generic DE, NL, world. Flashing with Flashtools 0.9.10.1 always stucks at 0%.
BL unlocked. Does anyone have any idea how to get stock 434 in the phone? Originally there were older one 10.1.A.1.340, if it's somehow important to know...

Xperia Z soft brick? known methods dont work

Xperia Z C6603, Rooted, Locked Bootloader, LED seems to function fine, vibrates, attempted key combinations: V.Down + Power ( reset and hard reset ), V.Up + Power ( same ), just power ( occasionally vibrates, sometimes doesnt ), V.Down and connect to pc ( blue led appears, but nothing else happens, pc doesnt recognize it, only beeps as a sign of smth connected, pc companion doesnt react ).
When charging i get a red blinking LED, no matter how long i charge ( about 8 hours attempted ) it doesnt change, the screen never turned on since all this started.
It started when i was attempting to flash a custom rom via TWRP ( CM 10.1 RC 5 ), in the middle of the installation of the ZIP, there was a missing file ( MD5 or smth like that, not sure ) and then the it said the installation was finished successfully, i rebooted the system... screen never turned on since.
Currently I am trying to wait till the battery runs out without a screen or LED so it may take a few days, i doubt it will work.
If anyone knows a way to turn it on, even factory settings, i dont care about the data, please post it in the comments.
EDIT: Its' on , flashed a tft. ( on the soft brick recovery main thread it said flashing tft only works with unlocked bootloader, but i guess it did say 2012 xperia )
DiligentAmatuer said:
Xperia Z C6603, Rooted, Locked Bootloader, LED seems to function fine, vibrates, attempted key combinations: V.Down + Power ( reset and hard reset ), V.Up + Power ( same ), just power ( occasionally vibrates, sometimes doesnt ), V.Down and connect to pc ( blue led appears, but nothing else happens, pc doesnt recognize it, only beeps as a sign of smth connected, pc companion doesnt react ).
When charging i get a red blinking LED, no matter how long i charge ( about 8 hours attempted ) it doesnt change, the screen never turned on since all this started.
It started when i was attempting to flash a custom rom via TWRP ( CM 10.1 RC 5 ), in the middle of the installation of the ZIP, there was a missing file ( MD5 or smth like that, not sure ) and then the it said the installation was finished successfully, i rebooted the system... screen never turned on since.
Currently I am trying to wait till the battery runs out without a screen or LED so it may take a few days, i doubt it will work.
If anyone knows a way to turn it on, even factory settings, i dont care about the data, please post it in the comments.
Click to expand...
Click to collapse
what happen when you try to turn it on? if you can get to the sony screen (or see the first LED light that coems up) try to hold vol up and down at the same time to get into recovery.
if that doesnt work reinstall Sony driver and try to flash a FTF
if that still doesnt work then your bassically screwed, need to send in the phone to get fix.
G1_enthusiast said:
what happen when you try to turn it on? if you can get to the sony screen (or see the first LED light that coems up) try to hold vol up and down at the same time to get into recovery.
if that doesnt work reinstall Sony driver and try to flash a FTF
if that still doesnt work then your bassically screwed, need to send in the phone to get fix.
Click to expand...
Click to collapse
It vibrates once, that's all, not even a LED.
flash a TFT? dont i need an unlocked bootloader for that?
DiligentAmatuer said:
flash a TFT? dont i need an unlocked bootloader for that?
Click to expand...
Click to collapse
No. http://forum.xda-developers.com/showthread.php?t=2275632
XperienceD said:
No. http://forum.xda-developers.com/showthread.php?t=2275632
Click to expand...
Click to collapse
It worked!! flashed an ftf, then i had boot loops, i just hard reset and it turned on
it seems diffrent from what i had, but i can just flash a more up-to-date ftf, or should i update with pc companion? Thx for the help
From now it is your choice. Ftf work no matter what but PC companion requires unmodified files. So PC companion may fail. Good luck
Sent from my C6603 using xda premium

[Q] Requesting Help with sony Xperia Z3 compact

Hi guys,
I had problem with my Sony Z3 compact touchscreen( touch screen not working for no reason). So I tired to flash my phone with Flashtool, but I made a stupid mistake and flashed it with D6603 instead of D5803 and now when I switch on my phone the screen comes on black and shows nothing but a dim light. I tried to flash it again with D5803 but it still has the same problem. Dose anyone knows how I can fix my mistake? Please let me know.
Thanks.
Bahman
Bahman_gh said:
Hi guys,
I had problem with my Sony Z3 compact touchscreen( touch screen not working for no reason). So I tired to flash my phone with Flashtool, but I made a stupid mistake and flashed it with D6603 instead of D5803 and now when I switch on my phone the screen comes on black and shows nothing but a dim light. I tried to flash it again with D5803 but it still has the same problem. Dose anyone knows how I can fix my mistake? Please let me know.
Thanks.
Bahman
Click to expand...
Click to collapse
Is it just showing black or the "Sony Xperia" boot screen?
Also did you flash the right D5803 firmware? (make sure all the numbers add up) different regions have different firmware's
Bahman_gh said:
Hi guys,
I had problem with my Sony Z3 compact touchscreen( touch screen not working for no reason). So I tired to flash my phone with Flashtool, but I made a stupid mistake and flashed it with D6603 instead of D5803 and now when I switch on my phone the screen comes on black and shows nothing but a dim light. I tried to flash it again with D5803 but it still has the same problem. Dose anyone knows how I can fix my mistake? Please let me know.
Thanks.
Bahman
Click to expand...
Click to collapse
A re-flash with the correct FW should fix the problem.
Just try it again. I would push the Power + VOL Button and wait until the device is vibrating 3 times.
After that re-flash the correct FW and everything should be fine.
BR
nzzane said:
Is it just showing black or the "Sony Xperia" boot screen?
Also did you flash the right D5803 firmware? (make sure all the numbers add up) different regions have different firmware's
Click to expand...
Click to collapse
Thanks nzzane It just shows black it plays the start up sound too but the screen is black Yes I used this D5803_23.0.1.A.5.77_RU firmware. And tried using sony companion but it didn't work. is there any way to clear the ROM and flash it again?
UserX10 said:
A re-flash with the correct FW should fix the problem.
Just try it again. I would push the Power + VOL Button and wait until the device is vibrating 3 times.
After that re-flash the correct FW and everything should be fine.
BR
Click to expand...
Click to collapse
Thanks UserX10 I did flash it with original software ( used PC companion) but still has the same problem.
Bahman_gh said:
Thanks UserX10 I did flash it with original software ( used PC companion) but still has the same problem.
Click to expand...
Click to collapse
You could try using flash tool, enter flashmode (bootloader on your phone) and click the lightning symbol in flashtool - follow the on screen instructions (If you have done this I am sorry) http://www.flashtool.net/downloads.php This link will help you with flashtool (It is old but you get the idea) http://androidforums.com/threads/flashtool-guide-how-to-for-n00bies.272949/
To enter flash mode turn the phone off by holding power and volume buttons until the phone vibrates -> once the phone is off hold the volume down button and connect the phone to the computer while holding the volume down button -> release the volume button when connected to computer (If done correctly the screen should stay off with no lights on)
Flashing the firmware should work - if not, Flashing a firmware does not void your warranty (As far as i know) so if you can't seem to fix it you might be able to send it back. By the sounds of it, from the screen not working from the start, it might just be a faulty handset
Thanks nzzane I have done all you said before I guess its hopeless after all.
Sadly I think it is :/
Hopefully you can send in in for repairs

[Q] Bricked? Phone won't turn on. Blinking red on charge; solid red on power button

hey everyone,
I recently got a warranty replacement of my xperia z3 compact. It came with the latest 5.1.1. I downgraded to .77 (kitkat) through flashtool, rooted, installed the latest dual recovery. In TWRP, I restored one of my old TWRP backups, which was a .28 (lollipop 5.0 I believe). When I press reboot after restoring, the phone won't turn on anymore. No LED or anything. When I plug it into the charger, the LED blinks red. When I hold down the power button while charging, the LED light became solid red.
Flashtool doesn't recognize the phone. What else can I do? Did I corrupt the bootloader? Any advice is appreciated. Thank you.
happened to me, just flash any stock firmware with flashtool (it doesnt need to be recognised) and do not plug in until it tells you to.
then follow the instructions and wipe everything
hope it helps
xpzx said:
happened to me, just flash any stock firmware with flashtool (it doesnt need to be recognised) and do not plug in until it tells you to.
then follow the instructions and wipe everything
hope it helps
Click to expand...
Click to collapse
I tried flashing with flashtool, but when I plug the phone in when asked to, flashtool does not recognize the phone being plugged in.
Do you know why this happened? Did I do anything (downgrade firmware, flash wrong firmware) that caused this to happen?
I cant tell what did it, because flashing any rom will brick mine to this state, and what do you mean by not recognised? Does it say preparing files for flashing? does it give the 'press volume down and power button' pop up?
xpzx said:
I cant tell what did it, because flashing any rom will brick mine to this state, and what do you mean by not recognised? Does it say preparing files for flashing? does it give the 'press volume down and power button' pop up?
Click to expand...
Click to collapse
yes, after it's done preparing files for flashing, a popup appears which tells me to plug in the phone while holding the volume down button. When I plug in the phone, nothing happens. The flashing process doesn't start
c19932 said:
yes, after it's done preparing files for flashing, a popup appears which tells me to plug in the phone while holding the volume down button. When I plug in the phone, nothing happens. The flashing process doesn't start
Click to expand...
Click to collapse
Do you be sure to hold the power and volume down button before and during the time you plug it in, until the pop up disappears?
Had something similar, but flashtool magically fixed it
http://forum.xda-developers.com/z3/...elp-thread-t3164306/post69146576#post69146576
I know it's a late reply, but my Z3c is rooted and running marshmellow. My phone would do the same thing, I thought it was bricked. After monkeying and monkeying it finally came back. The problem was I let the battery drain all the way to 0, and even while plugged in for a bit it didn't do anything. I think it liked it when I would plug it into my laptop instead of the power outlet. From then on, I haven't had the problem because I try to avoid the battery going completely dead.
Although the last time I did by accident, it did come back after plugging it in. My suggestion? Try plugging and charging it in your laptop and then turn on.
c19932 said:
hey everyone,
I recently got a warranty replacement of my xperia z3 compact. It came with the latest 5.1.1. I downgraded to .77 (kitkat) through flashtool, rooted, installed the latest dual recovery. In TWRP, I restored one of my old TWRP backups, which was a .28 (lollipop 5.0 I believe). When I press reboot after restoring, the phone won't turn on anymore. No LED or anything. When I plug it into the charger, the LED blinks red. When I hold down the power button while charging, the LED light became solid red.
Flashtool doesn't recognize the phone. What else can I do? Did I corrupt the bootloader? Any advice is appreciated. Thank you.
Click to expand...
Click to collapse
sorry about my english
is your PC detect your phone in fastmode ?
press and hold volume down and connect to your flashtool in your pc

My xperia z1 c6903 hard bricked while charging , tried all key combinations to reset

Nothing is happening , phone vibrates on pressing vol up + power button while charging
What did you do before? Were you in a stock ROM or AOSP based? Did you try to install any mod before it happened? Did you try flashing a stock firmware using flashtool? We need more info to help.
My phone bricked while charging
nemesisexsp said:
What did you do before? Were you in a stock ROM or AOSP based? Did you try to install any mod before it happened? Did you try flashing a stock firmware using flashtool? We need more info to help.
Click to expand...
Click to collapse
Only blue notification light was blinking on my phone , no booting
I send my phone to the seller since it was an imported phone ,they opened my phone and I don't know what they did . They sent back the phone saying it is out of warranty and now no notification lights are blinking
The phone will only vibrate when pressing vol+ and power button combination while plugged in nothing else will happen
Rajakumar R said:
Only blue notification light was blinking on my phone , no booting
I send my phone to the seller since it was an imported phone ,they opened my phone and I don't know what they did . They sent back the phone saying it is out of warranty and now no notification lights are blinking
The phone will only vibrate when pressing vol+ and power button combination while plugged in nothing else will happen
Click to expand...
Click to collapse
So you never used the phone, right? Try to charge it and flash the latest stock firmware (use flashtool).
not detected
nemesisexsp said:
So you never used the phone, right? Try to charge it and flash the latest stock firmware (use flashtool).
Click to expand...
Click to collapse
My phone is not detected By Flash tool and not charging
Try flashing stock firmware using flashtool. While you connect phone to pc u should hold volume down and then power button (flashmode). Just go through YouTube for flashing stock firmwares for z1.
Tried those things
giriz1c said:
Try flashing stock firmware using flashtool. While you connect phone to pc u should hold volume down and then power button (flashmode). Just go through YouTube for flashing stock firmwares for z1.
Click to expand...
Click to collapse
My phone is not detected either in flash mode or normal mode in pc , it only vibrates while pressing the reset button when plugged in .

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