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

[Q] xperia arc s fastboot mode

HEllo,
Can I boot into fastmode if my xperia has an unlockable bootloader?
Thank you

rjpcardoso said:
HEllo,
Can I boot into fastmode if my xperia has an unlockable bootloader?
Thank you
Click to expand...
Click to collapse
Can. Turn-off phone, then press and hold "Menu" button. Connect phone to computer. The LED will turn to blue color. Now, it is in fastboot mode.

...

hyper200 said:
...
Click to expand...
Click to collapse
If you have nothing to say then don't post.

pc-ox said:
Can. Turn-off phone, then press and hold "Menu" button. Connect phone to computer. The LED will turn to blue color. Now, it is in fastboot mode.
Click to expand...
Click to collapse
are you sure about this? I don't seem to be able to.

BernardoCalhanas said:
are you sure about this? I don't seem to be able to.
Click to expand...
Click to collapse
Then your bootloader isn't unlocked.

Keypad, type in *#*#7378423#*#*, Service Info, Configuration
If you see this
Code:
Bootloader unlocked: Yes
or this
Code:
Bootloader unlock allowed: Yes
then you can enter fastboot mode.
If you see this
Code:
Bootloader unlock allowed: No
then you can not enter fastboot.
Anymore questions?

Fastboot problem!
--

Someguyfromhell said:
Keypad, type in *#*#7378423#*#*, Service Info, Configuration
If you see this
Code:
Bootloader unlocked: Yes
or this
Code:
Bootloader unlock allowed: Yes
then you can enter fastboot mode.
If you see this
Code:
Bootloader unlock allowed: No
then you can not enter fastboot.
Anymore questions?
Click to expand...
Click to collapse
hello,
i m using xperia arc s and having Bootloader unlock allowed: Yes
in flashtool 0.9.10.1 i flash my device completely, then i attach a phone for fastboot,
everything going right, but when i click Lighting ICON => fastboot => OK nothing happen
need your help urgent
thanks in advance

You have to make sure that your phone has unlocked bootloader, if it says "bootloader unlock allowed: yes" it doesn't mean your phone is unlocked, it only tells you that it can be unlocked.
If you have TrackID, try to play it, if it can be played, then the bootloader is still locked.
For unlocking, try the link below. And don't forget to thank them.
http://forum.xda-developers.com/showthread.php?t=1133650
I hope it help, Cheers

Bagne said:
You have to make sure that your phone has unlocked bootloader, if it says "bootloader unlock allowed: yes" it doesn't mean your phone is unlocked, it only tells you that it can be unlocked.
If you have TrackID, try to play it, if it can be played, then the bootloader is still locked.
For unlocking, try the link below. And don't forget to thank them.
http://forum.xda-developers.com/showthread.php?t=1133650
I hope it help, Cheers
Click to expand...
Click to collapse
Thanks bro,
But, i found that Xperia Ultimate HD can also install on Locked Boot loader
You can find it in Developer's Page
Q 16: Can I install this ROM on locked bootloader?
Yes. You can without Problems.
I use flash tool 0.9.10.1 & LuPus Kerenl
need help

er.mayankpatel said:
hello,
i m using xperia arc s and having Bootloader unlock allowed: Yes
in flashtool 0.9.10.1 i flash my device completely, then i attach a phone for fastboot,
everything going right, but when i click Lighting ICON => fastboot => OK nothing happen
need your help urgent
thanks in advance
Click to expand...
Click to collapse
Put your phone into fastboot mode first (turn off your phone, hold down menu button and then connect the USB cable, blue LED shall light on).
Bagne said:
You have to make sure that your phone has unlocked bootloader, if it says "bootloader unlock allowed: yes" it doesn't mean your phone is unlocked, it only tells you that it can be unlocked.
If you have TrackID, try to play it, if it can be played, then the bootloader is still locked.
For unlocking, try the link below. And don't forget to thank them.
http://forum.xda-developers.com/showthread.php?t=1133650
I hope it help, Cheers
Click to expand...
Click to collapse
Only original TrackID, provided with phone. The one from Play Store works with unlocked bootloader aswell.

Bagne said:
You have to make sure that your phone has unlocked bootloader, if it says "bootloader unlock allowed: yes" it doesn't mean your phone is unlocked, it only tells you that it can be unlocked.
If you have TrackID, try to play it, if it can be played, then the bootloader is still locked.
For unlocking, try the link below. And don't forget to thank them.
http://forum.xda-developers.com/showthread.php?t=1133650
I hope it help, Cheers
Click to expand...
Click to collapse
Thanks For the Reply,
But, i want to flash my phone with XPERIA Ultimate HD, and on the Developer's page someone ask the question
Q 16: Can I install this ROM on locked bootloader?
Yes. You can without Problems.
if Yes, then how can i do this???????????
Please help, i just love this ROM

er.mayankpatel said:
Thanks For the Reply,
But, i want to flash my phone with XPERIA Ultimate HD, and on the Developer's page someone ask the question
Q 16: Can I install this ROM on locked bootloader?
Yes. You can without Problems.
if Yes, then how can i do this???????????
Please help, i just love this ROM
Click to expand...
Click to collapse
Just DON'T install it. My Xperia Arc s is locked bootloader and i tried to install Ultimate HD Rom twice, but no hope after installation Sony logo stucks!
first time i solved it by using Update Service.
second time (NOW) still on Sony logo and Update Service isn't working, it says "You already have the latest software installed"
so for now I'm searching for a way to fix it

dark-shadow93 said:
Just DON'T install it. My Xperia Arc s is locked bootloader and i tried to install Ultimate HD Rom twice, but no hope after installation Sony logo stucks!
first time i solved it by using Update Service.
second time (NOW) still on Sony logo and Update Service isn't working, it says "You already have the latest software installed"
so for now I'm searching for a way to fix it
Click to expand...
Click to collapse
Thanks dear,
I think it happen due to you have not unlock the bootloader
the same thing done with me,
now i am trying to unlock my bootloader
Use this link :- http://forum.xda-developers.com/showthread.php?t=1034087
After try this, Please tell me how can you do this????
Thanks in Advance

Someguyfromhell said:
Put your phone into fastboot mode first (turn off your phone, hold down menu button and then connect the USB cable, blue LED shall light on).
Only original TrackID, provided with phone. The one from Play Store works with unlocked bootloader aswell.
Click to expand...
Click to collapse
Thanks For your reply,
I do the same what you tell, after putting my phone in fast boot then i do the things in Flashtool.
But nothing hapen
Please advice, what to do

er.mayankpatel said:
Thanks dear,
I think it happen due to you have not unlock the bootloader
the same thing done with me,
now i am trying to unlock my bootloader
Use this link :- http://forum.xda-developers.com/showthread.php?t=1034087
After try this, Please tell me how can you do this????
Thanks in Advance
Click to expand...
Click to collapse
Just SOLVED IT! :laugh:
I flashed stock firmware using flash tool
stock firmware link by a member in the forum: http://www.mediafire.com/?rhr59r4o6oarnfx
then::
1. rooted the device
2. installed CWM
3. wiped everything
4. installed UHD and choosing just one app to install
5. unticked reboot
6. wiped Dalvik Cache ONLY
7. reboot device from CWM
8. Enjoyed UHD

UHD is stock based so it will work on locked boot loader, if it doesnt then you're doing something wrongly.
Sent from my Xperia Arc S using xda premium

tangosierra_ said:
UHD is stock based so it will work on locked boot loader, if it doesnt then you're doing something wrongly.
Sent from my Xperia Arc S using xda premium
Click to expand...
Click to collapse
Not necessarily! choosing to install all the apps in the AROMA Installer causes sticking on Sony logo in locked bootloaders.

tangosierra_ said:
UHD is stock based so it will work on locked boot loader, if it doesnt then you're doing something wrongly.
Sent from my Xperia Arc S using xda premium
Click to expand...
Click to collapse
Thanks,
But, i flash my device with the following FTF file LT18i_4.1.B.0.587_(1254-2716).ftf
If the problem comes due to this file, then which one is suitable for my ARC S ????
Please reply

Help My Xperia M is dead after relock the bootloader

Hello to all.
After relock my bootloader my Xperia M don't turn on. Conected to PC the red led flashes but nothing appens. When i turn it on it vibrate but it don't power on.
What can i do te get my xperia M back to life?
Please...

frodoring said:
Hello to all.
After relock my bootloader my Xperia M don't turn on. Conected to PC the red led flashes but nothing appens. When i turn it on it vibrate but it don't power on.
What can i do te get my xperia M back to life?
Please...
Click to expand...
Click to collapse
That happened to me also some time ago. I guess you probably locked the bootloader with a custom kernel. And if you had done it, try this
1) Unlock bootloader once again via fastboot it will work.

frodoring said:
Hello to all.
After relock my bootloader my Xperia M don't turn on. Conected to PC the red led flashes but nothing appens. When i turn it on it vibrate but it don't power on.
What can i do te get my xperia M back to life?
Please...
Click to expand...
Click to collapse
Yesterday i was have the same problem when relocked bootloader
- Now you need to update firmware via Update service on PC or flash official firmware via Flashtool and it will be with locked bootloader.

Thank you to all. I solve the problem flashing new OFW ftf 4.3 Update 15.4.A.0.23.
Now my bootloader is loked again and i lost ROOT access. But my Xperia M is now mor workable than ever

Can i flash 4.3 firmware on unlocked bl ?
Is it safe or
I have to relock it ?
And how (by flashtool will work)?
Sent from my C1904 using xda app-developers app

[Q] Can't unlock Xperia M bootloader

I'm unable to unlock my Xpeira M Single Sim Bootloader. I have checked in the service menu that it is unlockable and I also have a unlocking key but when I connect my phone in flashmode it says that "Your phone bootloader cannot be officially unlocked". What should I do?

Barbaad Billa said:
I'm unable to unlock my Xpeira M Single Sim Bootloader. I have checked in the service menu that it is unlockable and I also have a unlocking key but when I connect my phone in flashmode it says that "Your phone bootloader cannot be officially unlocked". What should I do?
Click to expand...
Click to collapse
You might want to take a look at this video "How to install Android Lollipop in Xperia M (CyanogenMod 12)" from Xperia M Tweaks on youtube. Just follow the steps till bootloader unlock and leave out the rest. Hope this helps.

and heres link https://www.youtube.com/watch?v=DkNu0tiNro8

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 ... )