failed to flash boot with unlocked bootloader (solved) - Sony Xperia Z Ultra

I got Z Ultra C6833
I can't run that command.
Every time i did, i got that failed remote thing
bootloader is unlocked and i am on latest firmware 270
I tried it on 290, it didn't work either
I tried with normal cmd or with run-as-admin mode, no news.
I tried with debug on/off, same result.
I can install dual recovery on 290 though, if i flash cm12 zip/gep zip from twrp, i got a dead z ultra.
No response at all. When i press power button, it will just vibrate once. That's all.
Then i need to re-flash the firmware.
So can someone tells me what i did wrong?
It was working fine most of the procedure to install GPE previously.
Thanks anyway.
--------------------------
It turned out my bootloader is locked
Once it is unlocked by following this
http://forum.xda-developers.com/showpost.php?p=58070067&postcount=34
All good to go. Thanks!

---

anyone?

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u cant boot a cm kernel on a stock xperia rom or the other way around...
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If you want to install a stock xperia based rom from zip file, xperia stock or scrubbers gpe port.
Start ur device in fastboot and flash a stock rom kernel with fastboot flash boot
Now push a recovery to the device with fastboot flash recovery
Reboot to recovery
Click to expand...
Click to collapse
If you are currently on stock rom and want to flash a cm based rom. You can do this by some metods.
Alternative A
This is if you want to do it from scratch. ie from stock rom and stock kernel and have no recovery.
Start ur device in fastboot and push a recovery to the device with fastboot flash recovery
Reboot to recovery
Flash cm based rom
Now extract boot.img from the cm based rom .zip file.
Start ur device in fastboot and push the boot.img to the device with fastboot flash boot
Reboot.
Click to expand...
Click to collapse
Alternative B
Or if you already have a working kernel and a working recovery.
Then you are already able to flash a cm rom. But when you reboot you will discover that the phone is "softbricked" as we call it.
The phone vibrate once and then turns off.
Start ur device in fastboot
Now extract boot.img from the cm based rom .zip file.
Push boot.img to your device with fastboot flash boot
Reboot.
Click to expand...
Click to collapse
You can get twrp from here https://dl.twrp.me/togari/
or from any boot.img file that has one recovery or many recoveries included in the .img file. For example stock based roms or kernels. But most easy is to use twrp.
I hope I didn't miss any detail. Just as if you have more questions. The heat today is making me ...tired..hard to concentrate

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SÜPERUSER said:
u cant boot a cm kernel on a stock xperia rom or the other way around...
If you want to install a stock xperia based rom from zip file, xperia stock or scrubbers gpe port.
If you are currently on stock rom and want to flash a cm based rom. You can do this by some metods.
You can get twrp from here https://dl.twrp.me/togari/
or from any boot.img file that has one recovery or many recoveries included in the .img file. For example stock based roms or kernels. But most easy is to use twrp.
I hope I didn't miss any detail. Just as if you have more questions. The heat today is making me ...tired..hard to concentrate
Click to expand...
Click to collapse
Hey, Thanks for your lengthy reply.
I think i did your Alternative A,
stock rom, flash dual recovery from dual recovery installer,
then go to recovery and flash cm zip and die.
Then go to fastboot mode and flash the boot.img and i got that failed remote blah blah blah error.
I tried with unlocked bootloader/locked bootloader, still the same command.
I tried from cmd with or without admin privilege, I tried via flash tool, all failed.
So my question is why fastboot command failed on me? My understanding is if bootloader is locked, i can't fastboot.
This is the first time it is happening on my Z Ultra. This is my 3rd Z Ultra.
I had flashed GPe rom before and it has no such a problem.
I just need to have custom recovery and then flash the GPe zip file, that's it.
Thanks anyway.

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pls copy paste the output from the terminal here

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sending 'boot' (13408 KB)...
OKAY [ 0.427s]
writing 'boot'...
FAILED (remote: Command not allowed)
finished. total time: 0.432s

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Enter *#*#7378423#*#* in the dialler, then look in Service info -> Configuration. It will say "Bootloader unlocked: Yes" if it's unlocked.
Click to expand...
Click to collapse
I doubt that the bootloader is unlocked

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SÜPERUSER said:
I doubt that the bootloader is unlocked
Click to expand...
Click to collapse
Thanks. I will try when my phone is alive again. Now looks like it is dead after formatting system and rebooted.
Trying to reflash the firmware.
Thanks

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Bootloader unlock allowed: Yes

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leme ask u what operating system you are using?
Perhaps try to use the admin account.
Run cmd as admin
Activate admin account with net user administrator /active:yes
logout and login as administrator
Delete all drivers related to android and your phone.
Download system wide ADB from here http://forum.xda-developers.com/showthread.php?t=2588979
Direct link: https://drive.google.com/file/d/0B0MKgCbUM0itVVFWRC02Q0VBQnc/view?usp=sharing
answer y on all the questions.
Now you can start a cmd from any folder by holding down left shift + right click and start command window here and then type the fastboot command

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unlock bootloader failed
...
FAILED (remote: Command did not succeed)
finished. total time: 0.022s

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win 7 running cmd with admin privilege.

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unlock bootloader failed
...
FAILED (remote: Command did not succeed)
finished. total time: 0.022s
Click to expand...
Click to collapse
What? u said ur bootloader is unlocked?
Okay. Lets start from the beginning.
Pls upload a screenshot of the dialer with that page saying bootloader unlock allowed: XX etc etc
Enter *#*#7378423#*#* in the dialler, then look in Service info -> Configuration. It will say "Bootloader unlocked: Yes" if it's unlocked.
Click to expand...
Click to collapse

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SÜPERUSER said:
What? u said ur bootloader is unlocked?
Okay. Lets start from the beginning.
Pls upload a screenshot of the dialer with that page saying bootloader unlock allowed: XX etc etc
Click to expand...
Click to collapse
there you go

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good. Now edit your post and remove the image. No need for it anymore.
There is personal details in the pic like imei number so dont keep it here on the forum visible.
It says that bootloader is allowed to be unlocked. It does not say that it is unlocked.
So what I am saying is that your bootloader is still locked.
You need to UNLOCK your bootloader. Follow the steps here to do so
http://developer.sonymobile.com/unlockbootloader/unlock-yourboot-loader/
There are also video guides showing how its done https://www.youtube.com/watch?v=iIdJg7KNH3A
IMPORTANT. skip the Android SDK part described in the guides. You do not need this. You already have fastboot working.
In short words what you need to do is to write down your imei number and paste it onto sony website when you are about the send the email.
Now go to your email inbox and check your mail. There should be a code from sony dev.
Start phone in fastboot mode and do
fastboot -i 0x0fce oem unlock 0xKEY <- replace the word KEY with the code you received in the mail.
If the output succeeded your bootloader are now unlocked.

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SÜPERUSER said:
good. Now edit your post and remove the image. No need for it anymore.
There is personal details in the pic like imei number so dont keep it here on the forum visible.
It says that bootloader is allowed to be unlocked. It does not say that it is unlocked.
So what I am saying is that your bootloader is still locked.
You need to UNLOCK your bootloader. Follow the steps here to do so
http://developer.sonymobile.com/unlockbootloader/unlock-yourboot-loader/
There are also video guides showing how its done https://www.youtube.com/watch?v=iIdJg7KNH3A
IMPORTANT. skip the Android SDK part described in the guides. You do not need this. You already have fastboot working.
Click to expand...
Click to collapse
Thanks. I am aware that, already cropped the image and uploaded the cropped one.
I don't think it is unlocked.
There are two messages when i tried to unlock from cmd
First one is
...
FAILED (remote: Command did not succeed)
finished. total time: 0.022s
Second one is
...
FAILED (remote: Device is already rooted)
finished. total time: 0.008s
this is the command i run from cmd with/without admin
fastboot -i 0x0fce oem unlock 0xUNLOCK_KEY

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tell me exactly what you write in the terminal. Exluding the code from sony, don't paste it here.
I don't understand why you get two different answers?

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pm-ed you.

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I am on a custom rom but I get the same result as you.
C:\Users\Administrator\Downloads>fastboot getvar version
version: 0.5
finished. total time: 0.005s
C:\Users\Administrator\Downloads>fastboot oem unlock
...
FAILED (remote: Device is already rooted)
finished. total time: 0.014s
Click to expand...
Click to collapse
What .ftf file did you flash when going back to stock after having a "dead device"?
Can you provide link? Name? Is it from here on the forum?
For example the ftf thread?
http://forum.xda-developers.com/xpe...tf-depository-sony-firmware-releases-t2829387
or here?
http://forum.xda-developers.com/xperia-z-ultra/general/ftf-14-5-0-270-customized-hk-t3114261
One method you can try but that is a bit outdated. Waaay outdated. From when this device was released on the market.
But you could try the method of unlocking it with flashtool
Quote from other post.
This will wipe your phone, so backup your stuff
You only need to unlock the bootloader if you want to run either a custom kernel or a custom ROM. Most ROMs based on the Sony releases will run on a locked bootloader.
Instructions:
Go to Sony's Developer site
Request the unlock key and check your mail straight away. Email is quick these days.
Open the latest Flashtool on your computer
Click the "BLU" icon
Follow the steps and enter your unlock key
Click to expand...
Click to collapse
If you do not have flashtool installed. Pls install.
Link: https://docs.google.com/uc?id=0ByK8JL7P6wDTdmtKYUpPcW93Zjg&export=download
Using older version cause newest version has weird issues with "pls move files from administrator folder to XXX X...."
This is the main window of flashtool
Click the BLU button
Follow the instruction... On z u this is holding vol down when plugging in the cable
It will now ask for the code.
Fill in the code and proceed.
Notice that my window says "relock". This is because my bootloader is already unlocked. In your case the window should say "unlock".

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Hey, thanks for the help, I followed this and it works. I mean i can unlock it. Time to have fun now. Thanks for your time and help.
http://forum.xda-developers.com/showpost.php?p=58070067&postcount=34