Develop Bugs

Xperia ion Bootloader Unlocking & Relocking

Taken from [Tutorial] Xperia S/P/U/Sola Bootloader Unlocking & Relocking and modified slightly for the ion. I take no credit for this tutorial.
Quick tutorial for unlocking & relocking the bootloader of the Xperia ion.
This is the official way to unlock bootloader
Warning!
This procedure will wipe the /data partition of your phone, so you will loose all ur stored data, settings. SDCARD will NOT BE WIPED!!!
DRM keys WILL be lost forever
Why should I unlock the bootloader?
You can flash custom ROMs/Kernels.
You don't need to worry if the new firmware can be rooted or not as with unlocked bootloader you can always ROOT your device.
SE/Sony gives sneak-peaks/preview builds of latest OS which requires unlocked bootloaders, as they did with Xperia 2011 line (they had ICS alpha/beta), so who knows may be SE/Sony may give early builds of ICS (JellyBean???)
Most of this is taken from lollylost100's his tutorial from ARC thread (all credits for that concise tutorial go to him, i have elaborated on a few things and added device specific changes)
[ Before we begin unlocking bootloader ]
Get the IMEI code for your device: type *#06# in phone dialer to find it out, note only the digits (no dashes)
Download the fastboot package with usb drivers (alternate drivers if the ones in package dont work)
Make sure u have a windows PC with USB cable to connect the phone
Power down your phone and keeping the Volume Up button pressed connect the USB cable to PC this will trigger FASTBOOT mode and windows will start driver installation, extract the above package and point the driver install to that location (usb_driver) folder
Once drivers are installed just disconnect cable and power on device
[ how to unlock ] (official way)
Go to: http://unlockbootloader.sonymobile.com/ and read everything!
At the bottom click 'Start Unlocking the Bootloader'
First, you should confirm that it is possible to unlock the boot loader of your phone by checking the service menu. In your phone, open the phone dial pad and enter *#*#7378423#*#* to access the service menu.
In your phone, tap Service info > Configuration > Rooting Status. If Bootloader unlock allowed says Yes, then you can continue with the next step. If it says No, or if the status is missing, your device cannot be unlocked.
Click to expand...
Click to collapse
After you have verified that you can unlock bootloader, scroll to the bottom of the page and click "Continue"
You will get "Are you sure prompt" accept it by clicking "yes i am sure" (i assume that you have read an understood it)
Then accept the "legal terms"
Finally you will get a "Create Unlock request" page, enter your IMEI (sometimes the last digit needs to be removed for this to work), name and email address
You should now receive your unique unlock key, its displayed on screen, SAVE THIS KEY SAFELY
Extract fastboot_with_Android_USB_file.rar and open fastboot folder
Hold SHIFT and right click on the background of the folder
Select 'Open command window here'
Connect your phone in fastboot mode (turn phone off, hold Volume UP button and plug in USB Cable) [make sure drivers are installed as explained above)
In the cmd windows type in fastboot.exe -i 0x0fce getvar version
If a value is returned (it will return 0.5), it means the phone is correctly connected
Type in fastboot.exe -i 0x0fce oem unlock 0xKEY and replace KEY with the key which you received earlier.
Your device should now be bootloader unlocked
If this tutorial is too much for you then itskapil wrote a step-by-step guide (and recorded a video also):
-Instructions: http://www.theandroidsoul.com/how-to...-play-neo-pro/
-Video: http://www.youtube.com/watch?v=LRH3pC7MhEA
(the above videos and some steps are for Xperia 2011 devices, but most the steps are same for Xperia ion)
Info on Relocking bootloader is in next post

Relocking bootloader
RELOCKING BOOTLOADER WILL ALLOW YOU TO GET NEWEST UPDATES & REPAIR DEVICE USING SEUS/PCC
Before we begin relocking the bootloader make sure that u have flashtool download & installed
You can get the latest version of FlashTool from:
http://androxyde.github.com/Flashtool/
Download link is under "Installation" tab
If you have not use FlashTool before read this thread:
http://forum.xda-developers.com/showthread.php?t=1526866
Download this FTF:
Xperia ion -> LT28-ION_Relock_bootloader_Dogsly-TEST.ftf // Mirror 1
Flash this FTF via FlashTool:
When it says enter flashmode, power down device and keeping VOLUME DOWN button pressed connect usb cable to phone, the device will now enter flashmode (green LED)
After this file is flashed reboot phone
Bootloader will now be relocked!!!
Incase device doesn't boot DO NOT PANIC... You can flash stock firmware FTF anytime to get back to stock ROM
P.S.: there is no official way to relock bootloader

So because my phone says I can't unlock the bootloader, does that mean I can never unlock the bootloader? Or do I have to wait to be able to root it first?
PS: I got my ion from Best Buy so is that why? Will I ever be able to unlock the BL ? I've rooted and unlocked my x10, back in the old days lol but I'm just wondering if there's any difference with getting a phone from at&t directly or from the sony store and best buy.

Auggy99 said:
So because my phone says I can't unlock the bootloader, does that mean I can never unlock the bootloader? Or do I have to wait to be able to root it first?
Click to expand...
Click to collapse
Have to wait to see if another way to unlock the bootloader is discovered. Root and unlocking the bootloader are two different things that accomplish or allow different things you can do on the phone.
IE rooting allows you to uninstall system apps & bloatware, backup apps/data, make changes to build.prop etc. Unlocking the bootloader will give you access to fastboot so you can flash custom roms/kernels and other images such as a pre-rooted system image to gain root.

I wonder. If we can not unlock the bootloader for some LT28at, why is there a key to unlock it? I did the Sony bootloader unlock for fun and apparently they have a key for my LT28at even though it says bootloader unlock is not allowed.

Bach415 said:
I wonder. If we can not unlock the bootloader for some LT28at, why is there a key to unlock it? I did the Sony bootloader unlock for fun and apparently they have a key for my LT28at even though it says bootloader unlock is not allowed.
Click to expand...
Click to collapse
You can unlock bootloader on the LT28i and, accordingly, there is a file to be relock bootloader LT28i

dogsly said:
You can unlock bootloader on the LT28i and, accordingly, there is a file to be relock bootloader LT28i
Click to expand...
Click to collapse
I understand that works for lt28i but I'm referring to lt28at the us model of the ion and why there is a bootlloader unlock code when we can't unlock it.

see if it works

Has anyone with an ion that has
Bootloader unlock allowed says Yes
Click to expand...
Click to collapse
tried to unlock it via the sony site and if you did and it was successful have you tried to relock it using the file linked above? Would be nice to know if that works.

Possible fix?
If the LT28i can be unlocked, what if we flash the international firmware on our LT28at's and then do the LT28i method? Maybe a stupid question but this is the first phone I've had that's a challenge to do stuff like unlocking and rooting. My last phone (HTC Aria) was extremely easy.

SU1CiDE said:
If the LT28i can be unlocked, what if we flash the international firmware on our LT28at's and then do the LT28i method? Maybe a stupid question but this is the first phone I've had that's a challenge to do stuff like unlocking and rooting. My last phone (HTC Aria) was extremely easy.
Click to expand...
Click to collapse
Flashing firmwares does not change the ability to unlock the bootloader.

Spectre51 said:
Flashing firmwares does not change the ability to unlock the bootloader.
Click to expand...
Click to collapse
Kinda figured that

I tried to relock the bootloader. The flash pass but the phone can't turn on after that.
*I reflash the stock kernel again and the phone can power on now.
So here is the result, once you relock bootloader, you need to flash back the stock kernel in other to turn on the phone. Hopefully this will help those people who got stuck after relock bootloader.

Hello guys
I was just wondering, if bootloader unlock or flashing cutom kernel will allow to use sim cards from other mobile operators (European for ex.) ?
I have an ability to buy this device in us through my friend. but Im interested if I would be able to use it in Europe I was thinking of buying xperia p or s, but they dont have microsd card support.
Im not interested in using LTE networks. Just common 2g.
I planning to use it like a second android device as a multimedia player instead of my galaxy s wifi5.0. (because of good sound quality and other features).
Thanx a lot for responses

Assyle said:
Hello guys
I was just wondering, if bootloader unlock or flashing cutom kernel will allow to use sim cards from other mobile operators (European for ex.) ?
I have an ability to buy this device in us through my friend. but Im interested if I would be able to use it in Europe I was thinking of buying xperia p or s, but they dont have microsd card support.
Im not interested in using LTE networks. Just common 2g.
I planning to use it like a second android device as a multimedia player instead of my galaxy s wifi5.0. (because of good sound quality and other features).
Thanx a lot for responses
Click to expand...
Click to collapse
No. You can't unlock the bootloader of the lt28at and you can't sim unlock it either. Best bet is get an international version not one from the US.
Sent from my LT28at using Tapatalk 2

Spectre51 said:
No. You can't unlock the bootloader of the lt28at and you can't sim unlock it either. Best bet is get an international version not one from the US.
Sent from my LT28at using Tapatalk 2
Click to expand...
Click to collapse
ok. thanx
probably wait for Xperia acro S... probably will be sold in europe in nearest future.

Drivers aren't working for my device. The alternative drivers link isn't working. Can someone please upload the alternative drivers. Thank you.:good:

i'm sorry if it was mentioned, but i didn't find . is there a way to unlock the carrier already for lt28at ? i don't mind losing the lte.

apkraven said:
i'm sorry if it was mentioned, but i didn't find . is there a way to unlock the carrier already for lt28at ? i don't mind losing the lte.
Click to expand...
Click to collapse
I think you can switch the rom to international version but it will still be bootloader locked. Not sure about carrier
Sent from my Sony Xperia Ion

apkraven said:
i'm sorry if it was mentioned, but i didn't find . is there a way to unlock the carrier already for lt28at ? i don't mind losing the lte.
Click to expand...
Click to collapse
Read this thread: http://forum.xda-developers.com/showthread.php?t=1761578
Sent from my LT22i using Tapatalk 2

Arc S 12W22 bootloader

My phone is manufactured in 12W22, is there ANY way to unlock the bootloader? It's a carrier branded phone (got it as a gift)

It is unlockable but you need to remove the carrier branding first.
僕のLT18iから送られてきた

popthosegaskets said:
It is unlockable but you need to remove the carrier branding first.
僕のLT18iから送られてきた
Click to expand...
Click to collapse
Could you please tell me where to start

malimukk said:
Could you please tell me where to start
Click to expand...
Click to collapse
http://www.wotanserver.com/en/sony-ericsson/xperia-arc-s-lt18/unlock-tool/debranding-flash

popthosegaskets said:
http://www.wotanserver.com/en/sony-ericsson/xperia-arc-s-lt18/unlock-tool/debranding-flash
Click to expand...
Click to collapse
oh sorry I made a big mistake, my arc is made in 12W22
Is there any way to unlock it?

malimukk said:
oh sorry I made a big mistake, my arc is made in 12W22
Is there any way to unlock it?
Click to expand...
Click to collapse
Any Arc manufactured after 12W11 will have a bootloader that cannot be unlocked. You can try wotanserver for the debranding but not sure if you can unlock your bootloader.
僕のLT18iから送られてきた

popthosegaskets said:
Any Arc manufactured after 12W11 will have a bootloader that cannot be unlocked. You can try wotanserver for the debranding but not sure if you can unlock your bootloader.
僕のLT18iから送られてきた
Click to expand...
Click to collapse
Mine's LT18a 12W15, perfectly unlocked and running JB so.. I'd tell him to give it a shot.

Of course, that number could be just a rumor, no harm trying it.
僕のLT18iから送られてきた

Hi mine is an Arc is network unlock as its an orange one and I'm using Vodafone. The numbers on it are 11W12 and I filled the thing in on Sony boot loader site and they've sent me a code.
I've rooted it already but it says in the service menu it says the bootloader can't be unlocked.
Mines an LT15i but it now says its Lt18i
What's right can it be unlocked or not?

petedaddi said:
Hi mine is an Arc is network unlock as its an orange one and I'm using Vodafone. The numbers on it are 11W12 and I filled the thing in on Sony boot loader site and they've sent me a code.
I've rooted it already but it says in the service menu it says the bootloader can't be unlocked.
Mines an LT15i but it now says its Lt18i
What's right can it be unlocked or not?
Click to expand...
Click to collapse

popthosegaskets said:
As long as you debranded it (network unlock) it should be unlockable
僕のLT18iから送られてきた
Click to expand...
Click to collapse
Until I flashed different firmware and rooted it still had orange start up screen etc but accepted my Vodafone sim. Sorry I'm new to Sony was Samsung before and not a noob.
Sent from my LT18i using Tapatalk 2

petedaddi said:
Until I flashed different firmware and rooted it still had orange start up screen etc but accepted my Vodafone sim. Sorry I'm new to Sony was Samsung before and not a noob.
Sent from my LT18i using Tapatalk 2
Click to expand...
Click to collapse
I understand you came from Samsung... I also used Samsung myself back then and experimented with the root and everything.
Rooted a S3 back then which had the "recovery-from-boot.p" script that did not allow me to flash CWM recovery on it.

popthosegaskets said:
I understand you came from Samsung... I also used Samsung myself back then and experimented with the root and everything.
Rooted a S3 back then which had the "recovery-from-boot.p" script that did not allow me to flash CWM recovery on it.
Click to expand...
Click to collapse
Okay, I've contacted the guys from Wotan Server and they say that they dont want to try unlocking my phone because of the production date..
Any other ideas?

malimukk said:
Okay, I've contacted the guys from Wotan Server and they say that they dont want to try unlocking my phone because of the production date..
Any other ideas?
Click to expand...
Click to collapse
You can try this guy:
http://forum.xda-developers.com/showthread.php?t=1322827
僕のLT18iから送られてきた

popthosegaskets said:
You can try this guy:
http://forum.xda-developers.com/showthread.php?t=1322827
僕のLT18iから送られてきた
Click to expand...
Click to collapse
No reply from him
Any other ideas?
And thank you for your help!!!

popthosegaskets said:
Any Arc manufactured after 12W11 will have a bootloader that cannot be unlocked. You can try wotanserver for the debranding but not sure if you can unlock your bootloader.
僕のLT18iから送られてきた
Click to expand...
Click to collapse
Wrong, official method still works for non-SIM locked phones. Branding has no effect at all.
popthosegaskets said:
As long as you debranded it (network unlock) it should be unlockable
僕のLT18iから送られてきた
Click to expand...
Click to collapse
As I already said, it does not matter, if phone has branded firmware or not. It has nothing to do with bootloader unlocking.
If the fastboot is disabled, then you can not do anything. This mostly occurs, when phone is SIM-locked.
If the fastboot is enabled, then you can use official method at unlockbootloader.sonymobile.com.
To see, if fastboot is enabled or disabled, just try entering it - Turn off the phone, hold down Menu button, connect USB cable. If blue LED lights up and stays on, fastboot is enabled and you can use the official method.

Someguyfromhell said:
Wrong, official method still works for non-SIM locked phones. Branding has no effect at all.
As I already said, it does not matter, if phone has branded firmware or not. It has nothing to do with bootloader unlocking.
If the fastboot is disabled, then you can not do anything. This mostly occurs, when phone is SIM-locked.
If the fastboot is enabled, then you can use official method at unlockbootloader.sonymobile.com.
To see, if fastboot is enabled or disabled, just try entering it - Turn off the phone, hold down Menu button, connect USB cable. If blue LED lights up and stays on, fastboot is enabled and you can use the official method.
Click to expand...
Click to collapse
I can't enter fastboot, my phone is sim-locked. I think that I could get the unlock code from my carrier, would that make any difference?

malimukk said:
I can't enter fastboot, my phone is sim-locked. I think that I could get the unlock code from my carrier, would that make any difference?
Click to expand...
Click to collapse
Unfortunately, no. This does still not enable fastboot. Fastboot can be enabled only via test point method, but due to newer security systems, this is not possible on phones manufactured after 12W11.
So, unfortunately, you are one of the unlucky ones, who have to deal with locked bootloader. For now. Until a method is found, that can bypass the newer security standards.

Flashing kernel, Test Point unlocked

Hi everyone!
Yesterday I unlocked bootloader of my Arc, and now I'd like to flash XUK, but.. I read that phones with bootloader unlocked by Test point method can't be flashed with a .img kernel, only with .ftf. Is that true?
And if is, how can I convert boot.img -> boot.ftf to flash it with flashtool?
Thanks a lot

arrivaellobo said:
I read that phones with bootloader unlocked by Test point method can't be flashed with a .img kernel, only with .ftf. Is that true?
Click to expand...
Click to collapse
First time I hear this. Definitely false statement.
On side note - Boot.img can not be converted to boot.ftf. Maybe can, but not worth the time and effort.

Someguyfromhell said:
First time I hear this. Definitely false statement.
On side note - Boot.img can not be converted to boot.ftf. Maybe can, but not worth the time and effort.
Click to expand...
Click to collapse
So there's no risk flashing in fastboot on this Arc?
Tomorrow I'll try that.
Thanks a lot again.

You can't really fail with flashing kernel, as long as you got the command right. If it does return an error in fastboot, post it here and we will find the reason.

I tried to enter into fastboot, but the phone starts to charge instead of turn blue the Led. I'm a bit confused with that, because S1 Tool shows:
RUNNING S1_EROM VER "r9A021"
SOFTWARE AID: 0001
LOADER AID: 0001
FLASH ID: "002C/00B3"
LOADER VERSION: "r4A069"
SEMC SIMLOCK CERTIFICATE
The small "r" means that bootloader is unlocked.. then, why can't I enter to fastboot?

Any help?
Thanks

Just flash a kernel with fastboot. Post the log if you need more information.
I am not sure, what are you trying to say with S1.

Someguyfromhell said:
Just flash a kernel with fastboot. Post the log if you need more information.
I am not sure, what are you trying to say with S1.
Click to expand...
Click to collapse
I can't enter to fastboot, when I try it, the phone starts to charge, like phones with locked bootloader. That is what confuses me.

Phones with locked bootloaders can enter fastboot mode, but they wouldn't be able to flash a kernel. Flashing would end up with an error.
In your case, the fastboot is disabled then. 12W11 and earlier manufactured phones can have fastboot enabled via testpoint method. Others don't.

Someguyfromhell said:
Phones with locked bootloaders can enter fastboot mode, but they wouldn't be able to flash a kernel. Flashing would end up with an error.
In your case, the fastboot is disabled then. 12W11 and earlier manufactured phones can have fastboot enabled via testpoint method. Others don't.
Click to expand...
Click to collapse
Mi phone is 11W29, could I enable it?
I'm pretty sure than my bootloader is unlocked, because S1Tool shows a small "r".. I mean, I followed this guide

arrivaellobo said:
Mi phone is 11W29, could I enable it?
I'm pretty sure than my bootloader is unlocked, because S1Tool shows a small "r".. I mean, I followed this guide
Click to expand...
Click to collapse
You can
僕のINO2から送られてきた

popthosegaskets said:
You can
僕のINO2から送られてきた
Click to expand...
Click to collapse
How?

Dial *#*#7378423#*#* and go to --> "Service Info" --> "Configuration"
What you see?

arrivaellobo said:
How?
Click to expand...
Click to collapse
Phones made before 12W11 have unlockable bootloaders.
僕のINO2から送られてきた

Tony3577 said:
Dial *#*#7378423#*#* and go to --> "Service Info" --> "Configuration"
What you see?
Click to expand...
Click to collapse
Althought service menu shows B.U.A: no, I unlocked bootloader with test point method, and it seemed to work, but I still don't have access to fastboot.
Do you understand what I mean?

I don't think the unlocking process was successful then.

It seems that you can not unlock
From Sony website (read poin 2):
http://unlockbootloader.sonymobile.com/instructions
Might be useful to read this:
http://forum.xda-developers.com/showthread.php?t=2102783
http://forum.xda-developers.com/showthread.php?t=1896553

Someguyfromhell said:
I don't think the unlocking process was successful then.
Click to expand...
Click to collapse
The guide I followed to unlock it say that:
and my phone is "Loader version: r4A069".
I have not mentioned that I unlocked simlock with NCK code provided by my telephone company before try to unlock bootloader with the testpoint method. Actually I can use any simcard from any company and it works fine, and in theory I unlocked bootloader too.. It's very confusing can't to access to fastboot in my situation.

arrivaellobo said:
The guide I followed to unlock it say that:
and my phone is "Loader version: r4A069".
I have not mentioned that I unlocked simlock with NCK code provided by my telephone company before try to unlock bootloader with the testpoint method. Actually I can use any simcard from any company and it works fine, and in theory I unlocked bootloader too.. It's very confusing can't to access to fastboot in my situation.
Click to expand...
Click to collapse
Which guide did you follow? Using test point method to unlock bootloader should enable fastboot as well.
Test point method would have removed the simlock anyway, could have saved some bucks if you paid for the code.

Someguyfromhell said:
Which guide did you follow? Using test point method to unlock bootloader should enable fastboot as well.
Test point method would have removed the simlock anyway, could have saved some bucks if you paid for the code.
Click to expand...
Click to collapse
No, I didn't pay for the code. When the contract with the phone company finish, they have to give the code for free.
I don't know, I'll tray again to unlock with test point.
In attached files is the guide I followed, but it's in spanish.
Here's a similar tutorial in english, but in that says phones "unlock allowed: no" cannot be unlocked with testpoint :silly:
http://androidflip.com/unlock-xperia-phones-bootloader-without-losing-drm-data-track-id-working/

Is there any way to relock the BL?

I want to return the device to stock and read on the sony dev website you have to flash a firmware but I do not see the Z5P, is there any other way?
thanks,
AC

Is there a reason why you need to relock the BL? According to Sony, there is no way to restore an unlocked BL.
Q: If I change my mind later on, is there any way to restore my device?
A: No. Once you have unlocked the boot loader, you will not be able to revert the device back to a locked or original state or restore the DRM security keys. You can however use the Flash tool for Xperia™ devices to flash a generic Sony ROM, although it will not receive automatic software upgrades.
Source
Click to expand...
Click to collapse

fancymans said:
Is there a reason why you need to relock the BL? According to Sony, there is no way to restore an unlocked BL.
Click to expand...
Click to collapse
Thanks but the Z5P does not come up as a supported device for the flash tool yet, so I guess the answer is no

aaronc_98 said:
Thanks but the Z5P does not come up as a supported device for the flash tool yet, so I guess the answer is no
Click to expand...
Click to collapse
Whats up with warranty after unlocking BL?

miHah said:
Whats up with warranty after unlocking BL?
Click to expand...
Click to collapse
Ask your consumer affairs lawyer in your locality. That's the proper person to ask.
Sent from my SGP311 using XDA Free mobile app

whats the use of re-locking it man you already lost your TA

aaronc_98 said:
I want to return the device to stock and read on the sony dev website you have to flash a firmware but I do not see the Z5P, is there any other way?
thanks,
AC
Click to expand...
Click to collapse
You can relock it using flashtool. Just choose Xperia Z5 when the device window appears. I've already tried it, works like a charm.

Not sure if you can relock it without the back up drm keys. Since there isn't a backup program yet I would assume you've already lost the drm keys. I'm afraid you won't be to revert back to the same. Camera quality and x reality will be affected.

arjun.arora said:
You can relock it using flashtool. Just choose Xperia Z5 when the device window appears. I've already tried it, works like a charm.
Click to expand...
Click to collapse
OK i have found flashtool and click the x, but when when the device reboots and the device chooser comes up, there is no z5p to choose from so just to confirm we use z5, correct?
thanks,

aaronc_98 said:
OK i have found flashtool and click the x, but when when the device reboots and the device chooser comes up, there is no z5p to choose from so just to confirm we use z5, correct?
thanks,
Click to expand...
Click to collapse
Some important things before you attempt the relock:
The DRM keys will not be restored after the relock.
You have to reflash the entire firmware or just flash the stock kernel before relocking the bootloader.
The phone should be on stock kernel, if you try to relock it with custom kernel the phone might brick.
Click BLU in flashtool and follow the instructions.

arjun.arora said:
Some important things before you attempt the relock:
The DRM keys will not be restored after the relock.
You have to reflash the entire firmware or just flash the stock kernel before relocking the bootloader.
The phone should be on stock kernel, if you try to relock it with custom kernel the phone might brick.
Click BLU in flashtool and follow the instructions.
Click to expand...
Click to collapse
OK sucessfully flashed the FTF, how can I check if the BL is locked?
thanks,

aaronc_98 said:
OK sucessfully flashed the FTF, how can I check if the BL is locked?
thanks,
Click to expand...
Click to collapse
Turn off the mobile.
Press the BLU button in flashtool.
Press the volume down button of your mobile and connect it to the PC.
A pop up window will open, select Xperia Z5 (Z5P is not listed yet).
Another window will open, if you see Relock, press it, the bootloader will be relocked.
Let the process be over, then restart the mobile.

arjun.arora said:
Turn off the mobile.
Press the BLU button in flashtool.
Press the volume down button of your mobile and connect it to the PC.
A pop up window will open, select Xperia Z5 (Z5P is not listed yet).
Another window will open, if you see Relock, press it, the bootloader will be relocked.
Let the process be over, then restart the mobile.
Click to expand...
Click to collapse
Thanks Arjun!
Sent from my Nexus 6P using XDA Free mobile app

Relocking Bootloader
I had to unlock my device's bootloader to downgrade it to marshmallow because of the WiFi issue in Nougat, so i did it and didn't backed up the DRM keys(i didn't knew i am supposed to do it. It wasn't mentioned in the tutorial i was following or i missed it). Anyways now i am on marshmallow and i am unable to update it VIA xperia companion. It complains that bootloader is unlocked. Now if i lock the bootloader will xperia companion will work ? What is the affect of the lost DRM keys ? And if anyone knows the WiFi issue is sovled or not ?

neodescorpio said:
I had to unlock my device's bootloader to downgrade it to marshmallow because of the WiFi issue in Nougat, so i did it and didn't backed up the DRM keys(i didn't knew i am supposed to do it. It wasn't mentioned in the tutorial i was following or i missed it). Anyways now i am on marshmallow and i am unable to update it VIA xperia companion. It complains that bootloader is unlocked. Now if i lock the bootloader will xperia companion will work ? What is the affect of the lost DRM keys ? And if anyone knows the WiFi issue is sovled or not ?
Click to expand...
Click to collapse
Salam
use flashtool to upgrade / downgrade to any rom! you have unlocked bootloader! i never used xperia companion to update my z5p

Companin works after Relock BL
neodescorpio said:
I had to unlock my device's bootloader to downgrade it to marshmallow because of the WiFi issue in Nougat, so i did it and didn't backed up the DRM keys(i didn't knew i am supposed to do it. It wasn't mentioned in the tutorial i was following or i missed it). Anyways now i am on marshmallow and i am unable to update it VIA xperia companion. It complains that bootloader is unlocked. Now if i lock the bootloader will xperia companion will work ? What is the affect of the lost DRM keys ? And if anyone knows the WiFi issue is sovled or not ?
Click to expand...
Click to collapse
Yes It will work!

IslzaeL said:
Yes It will work!
Click to expand...
Click to collapse
Can confirm I did the same thing and forgot the keys (new to Sony devices vs. Google). IF you use the XDA FlashTool, you can re-lock the bootloader and Xperia Companion will recognize for a Factory reset of your device.

baldock88 said:
Can confirm I did the same thing and forgot the keys (new to Sony devices vs. Google). IF you use the XDA FlashTool, you can re-lock the bootloader and Xperia Companion will recognize for a Factory reset of your device.
Click to expand...
Click to collapse
Did you restore the DRM keys from Xperia Companion or at least retrieve all the functions that DRM related (Xreality, Bravia engine ... )

Xperia M doesn't boot after unlocking bootloader

HELP NEEDED!
Hi guys,
So I tried to unlock bootloader on my Xperia M (C1904). And after unlocking, it doesn't boot anymore. Just shows "Sony", and "Xperia", then the wave animation forever.
First of all, I access to Sony Developer World for unlock bootloader key, then used flashtool's BLU feature. It successfully completed and said "Device will reboot into system now" However it showed the wave animation forever, (waited for around 20 or more minutes) but there was no change, so I flashed stock .ftf file via Flashmode. HOWEVER, everything was the same as before.
Then I used BLU feature again to try Re-locking the bootloader, but it said that "Processing of loader.sin finished with errors." and "Your phone bootloader cannot be officially unlocked". I am sure that my XM is bootloader unlocking supported, and flashtool successfully finished unlocking.
I searched around the Internet and found many people is having same problem with me.
I DID try using Sony PC Companion to repair the software, but as you can imagine. It simply showed ERROR.
I need your help as fast as possible.
Thank you, and sorry for my bad English btw.
PS I did read XDA threads about this problem, but nothing helped much.

Reflesh the ROM stock in Flashtools
Flesha ROM original no flashtols

xperiaum said:
HELP NEEDED!
Hi guys,
So I tried to unlock bootloader on my Xperia M (C1904). And after unlocking, it doesn't boot anymore. Just shows "Sony", and "Xperia", then the wave animation forever.
First of all, I access to Sony Developer World for unlock bootloader key, then used flashtool's BLU feature. It successfully completed and said "Device will reboot into system now" However it showed the wave animation forever, (waited for around 20 or more minutes) but there was no change, so I flashed stock .ftf file via Flashmode. HOWEVER, everything was the same as before.
Then I used BLU feature again to try Re-locking the bootloader, but it said that "Processing of loader.sin finished with errors." and "Your phone bootloader cannot be officially unlocked". I am sure that my XM is bootloader unlocking supported, and flashtool successfully finished unlocking.
I searched around the Internet and found many people is having same problem with me.
I DID try using Sony PC Companion to repair the software, but as you can imagine. It simply showed ERROR.
I need your help as fast as possible.
Thank you, and sorry for my bad English btw.
PS I did read XDA threads about this problem, but nothing helped much.
Click to expand...
Click to collapse
Buddy download stock firmware that works with your device(c1904) and I have heard that newley flashtool have some bugs most of the peoples found it difficult to use due to error so download a old version of flashtool.
Here is the link for flashtool that I use
https://drive.google.com/file/d/0B3WS5xjTt_0tQTZzQmNiZFc0R2M/view?pref=2&pli=1
It works smooth and don't forget to install drivers for xperia M found in C:/Flashtool/drivers after unpacking flashtool

Thank you guys for helping me.
I tried re-locking and flashed the stock firmware, and now my XM is working normally again.
Now, the question is, "Is there a way to safely unlock bootloader without soft bricking?"

xperiaum said:
Thank you guys for helping me.
I tried re-locking and flashed the stock firmware, and now my XM is working normally again.
Now, the question is, "Is there a way to safely unlock bootloader without soft bricking?"
Click to expand...
Click to collapse
Here
http://forum.xda-developers.com/showthread.php?t=2484622

KayM6.0.1 said:
Reflesh the ROM stock in Flashtools
Flesha ROM original no flashtols
Click to expand...
Click to collapse
matrixex said:
[/HIDE]
Buddy download stock firmware that works with your device(c1904) and I have heard that newley flashtool have some bugs most of the peoples found it difficult to use due to error so download a old version of flashtool.
Here is the link for flashtool that I use
https://drive.google.com/file/d/0B3WS5xjTt_0tQTZzQmNiZFc0R2M/view?pref=2&pli=1
It works smooth and don't forget to install drivers for xperia M found in C:/Flashtool/drivers after unpacking flashtool.
If you are still facing problem than PM me I will help you to download SONY Original Stock Firmware(country wise) and how to create a ftf for your device.
It really worked for me.
Click to expand...
Click to collapse
KayM6.0.1 said:
Here
http://forum.xda-developers.com/showthread.php?t=2484622
Click to expand...
Click to collapse
I did follow those steps yesterday, and flashtool said it DID unlock the bootloader, but my phone didn't boot at all and all those things happened. Should I try the same steps again and see if it works this time?

xperiaum said:
I did follow those steps yesterday, and flashtool said it DID unlock the bootloader, but my phone didn't boot at all and all those things happened. Should I try the same steps again and see if it works this time?
Click to expand...
Click to collapse
Try the above code and see if this unlocked

KayM6.0.1 said:
Try the above code and see if this unlocked
Click to expand...
Click to collapse
So you mean that I should try to unlock it again? Currently it's not.

xperiaum said:
So you mean that I should try to unlock it again? Currently it's not.
Click to expand...
Click to collapse
Yes! But first try the code *#*#7378423#*#* to see if it worked
I can answer in Portuguese ?
I am Brazilian my English is not very good

KayM6.0.1 said:
Yes! But first try the code *#*#7378423#*#* to see if it worked
I can answer in Portuguese ?
I am Brazilian my English is not very good
Click to expand...
Click to collapse
Haha, sorry but I don't speak Portuguese. I did try *#*#7378423#*#* and it says that the bootloader is unlockable. I will try to unlock it again using flashtool and report how it goes. Thx.

xperiaum said:
Haha, sorry but I don't speak Portuguese. I did try *#*#7378423#*#* and it says that the bootloader is unlockable. I will try to unlock it again using flashtool and report how it goes. Thx.
Click to expand...
Click to collapse
entedes espanhol?
---------- Post added at 01:27 PM ---------- Previous post was at 01:25 PM ----------
xperiaum said:
Haha, sorry but I don't speak Portuguese. I did try *#*#7378423#*#* and it says that the bootloader is unlockable. I will try to unlock it again using flashtool and report how it goes. Thx.
Click to expand...
Click to collapse
https://www.youtube.com/watch?v=b0tBdDmtYB4
Here and in SPANISH but teaches step by step
good lucky!

KayM6.0.1 said:
entedes espanhol?
---------- Post added at 01:27 PM ---------- Previous post was at 01:25 PM ----------
https://www.youtube.com/watch?v=b0tBdDmtYB4
Here and in SPANISH but teaches step by step
good lucky!
Click to expand...
Click to collapse
Spanish teacher, well... a bit difficult for me
So I tried it again, and I successfully unlocked this time!!
Then I flashed AOSP 6.0! surprise!
Well, so thanks a lot for your kind help man! Now my phone's running the latest Rom

xperiaum said:
Spanish teacher, well... a bit difficult for me
So I tried it again, and I successfully unlocked this time!!
Then I flashed AOSP 6.0! surprise!
Well, so thanks a lot for your kind help man! Now my phone's running the latest Rom
Click to expand...
Click to collapse
You're welcome! I am using the Ressurection remix 5.6.3 in my XMdual

xperiaum said:
HELP NEEDED!
Hi guys,
So I tried to unlock bootloader on my Xperia M (C1904). And after unlocking, it doesn't boot anymore. Just shows "Sony", and "Xperia", then the wave animation forever.
First of all, I access to Sony Developer World for unlock bootloader key, then used flashtool's BLU feature. It successfully completed and said "Device will reboot into system now" However it showed the wave animation forever, (waited for around 20 or more minutes) but there was no change, so I flashed stock .ftf file via Flashmode. HOWEVER, everything was the same as before.
Then I used BLU feature again to try Re-locking the bootloader, but it said that "Processing of loader.sin finished with errors." and "Your phone bootloader cannot be officially unlocked". I am sure that my XM is bootloader unlocking supported, and flashtool successfully finished unlocking.
I searched around the Internet and found many people is having same problem with me.
I DID try using Sony PC Companion to repair the software, but as you can imagine. It simply showed ERROR.
I need your help as fast as possible.
Thank you, and sorry for my bad English btw.
PS I did read XDA threads about this problem, but nothing helped much.
Click to expand...
Click to collapse
KayM6.0.1 said:
You're welcome! I am using the Ressurection remix 5.6.3 in my XMdual
Click to expand...
Click to collapse
So problem solved everybody try cyanogenmod 13 nightly by PeacnCM
supports all Nicki device fast s fluid just give it a try .

flashtool bug
I had similar problems as described in the first thread.
My flashtool version was 0.9.19.8 and during the blu-process the level meter stucks.
With "new" version 09.18.1 - as mentioned in one of the early replys - everything worked well.

xperiaum said:
Thank you guys for helping me.
I tried re-locking and flashed the stock firmware, and now my XM is working normally again.
Now, the question is, "Is there a way to safely unlock bootloader without soft bricking?"
Click to expand...
Click to collapse
Buddy for first time soft bricking happens with all it happened with me too because for first time the DRM keys (a kind of key used to get sony official support and update OTA) get wiped forever since DRM keys are integral part of BOOT so it will led to softbrick only for first time after that you can easily unlock or relock your Device

matrixex said:
Buddy for first time soft bricking happens with all it happened with me too because for first time the DRM keys (a kind of key used to get sony official support and update OTA) get wiped forever since DRM keys are integral part of BOOT so it will led to softbrick only for first time after that you can easily unlock or relock your Device
Click to expand...
Click to collapse
I see, didn't know that. It didn't happen when I unlocked bootloader on my Xperia U and... X10.

xperiaum said:
I see, didn't know that. It didn't happen when I unlocked bootloader on my Xperia U and... X10.
Click to expand...
Click to collapse
I an 100%sure because i have unlocked my two devices both are xperia M Dual and bricked(bootloop) and I am 100% due to loosing DRM Keys. And don't reply or continue this comment the END

I am facing a similar issue.......
Unlocked by fastboot..... received [okay]....... seemed Unlocked and then bootloop....
After flashing again with the stock rom [generated by Flashtool decryption of Sony PC companion folder C:\ProgramData\Sony Mobile\Update Engine\db\13740270\blob_fs]....... I am not able to install TWRP recovery...
Now I am not sure whether the bootloader is locked or unlocked......
Is there a way to check........ further I intend to install CM13........ how to proceed...

ijsa said:
I am facing a similar issue.......
Unlocked by fastboot..... received [okay]....... seemed Unlocked and then bootloop....
After flashing again with the stock rom [generated by Flashtool decryption of Sony PC companion folder C:\ProgramData\Sony Mobile\Update Engine\db\13740270\blob_fs]....... I am not able to install TWRP recovery...
Now I am not sure whether the bootloader is locked or unlocked......
Is there a way to check........ further I intend to install CM13........ how to proceed...
Click to expand...
Click to collapse
Well, you should be able to check if your device is unlocked when you connect to flashtool, can't you?