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Do I need to relock the bootloader to use PC Companion for latest stock?

I want to go back to stock for now Xperia J, and do I need to relock the bootloader or just use SEUS/PC Companion to flash latest stock?
Thanks in advance.

If you are on a custom rom then you need to download the stock ftf file and flash it using flashtool to get PC Companion or SEUS to work.
You don't need to unlock bootloader.

Yes you need

fuser1337 said:
If you are on a custom rom then you need to download the stock ftf file and flash it using flashtool to get PC Companion or SEUS to work.
You don't need to unlock bootloader.
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I'm asking about re-locking it, it is already unlocked. Can I have more opinions? I don't want to brick the phone.

download the ICS ftf, flash, then relock bootloader.

stranded.eu said:
I'm asking about re-locking it, it is already unlocked. Can I have more opinions? I don't want to brick the phone.
Click to expand...
Click to collapse
https://docs.google.com/file/d/0B_d8uWGbkaetSDFrcTNJLWVnNVU/edit?pli=1
Flash this via flashtool.
Credits to xperia.cz for this
First flash stock ftf or you will brick your phone

deleted

Yeah does it make any difference?

Just asking. I know it doesn't.
Sent from my ST26i using xda premium

Help me please
Steam. said:
download the ICS ftf, flash, then relock bootloader.
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i cant flash my firmware for xperia miro...please tell me how to lock my bootloader and then flash my firmware

stranded.eu said:
I want to go back to stock for now Xperia J, and do I need to relock the bootloader or just use SEUS/PC Companion to flash latest stock?
Thanks in advance.
Click to expand...
Click to collapse
Sony PC companion requires locked bootloader to work bro.
Since you are already on unlocked bootloader, you can just download the ftf file you want and flash it using flashtool. Using flashtool you can flash firmwares on both locked and unlocked bootloaders

You need a locked bootloader and any stock ROM to update through PC companion.

andy_chon said:
i cant flash my firmware for xperia miro...please tell me how to lock my bootloader and then flash my firmware
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Click to collapse
um..download flashtool..connect your phone using flashmode..click on the bootloader button..it wil go through a process..then relock your bootloader..then click on thunder icon..select flashmode...browse the firmware location select it..then FLASH
JUST DONT SAY THANKS....HIT THANKS..!! BE HELPFULL

[TIPO] RELOCK your Bootloader

Hello Guys.
I made a ftf file that RE-locks your bootloader.
Just Unpack and Flash it.
It can be RE-unlocked through this -> http://unlockbootloader.sonymobile.com/
Hope you like it.
Requirements :
Flashtool
Working drivers installed
A brain
For sombody who dont know to flash with Flashtool
HERE IS A PICTURE !!! KLICK ME !!
GreeZ
Slluxx

Will this work for newer versions of firmware like .22 and .27

[Q] I need to relock bootloader and unroot to flash the stock rom?

1- Do I need to unroot the phone(xperia L) and relock the bootloader to flash the stock rom?
2-Does flashing the stock rom removes CWM(I want to remove it)?
Thank's in advance!

you can return to stock firmware using FLASH TOOL for xperia ( google it )
With this you can lock the bootloader but before that flash the stock rom @ http://forum.xda-developers.com/xperia-l/general/sony-xperia-l-flashable-ftfs-locked-t2560642
and yes flashing stock rom with FLASH TOOL will also remove CWM
hit thanks if that helped because today i also returned to stock rom

NG3000 said:
you can return to stock firmware using FLASH TOOL for xperia ( google it )
With this you can lock the bootloader but before that flash the stock rom @ http://forum.xda-developers.com/xperia-l/general/sony-xperia-l-flashable-ftfs-locked-t2560642
and yes flashing stock rom with FLASH TOOL will also remove CWM
hit thanks if that helped because today i also returned to stock rom
Click to expand...
Click to collapse
Well, i'l be using flashtool to flash the stock rom, but what i am asking, is if I need to relock bootloader to flash the stock rom, and i already have a unlocked bootloader

no you can flash it without locking

FIXED
Thank's, i have another question, can i update the system while the bootloader is unlocked?

LoddFern said:
FIXED
Thank's, i have another question, can i update the system while the bootloader is unlocked?
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Click to collapse
No,you won't recive ota and can't update phone using pc companion and sus.You can only update phone using flashtool by flashing a ftf with the system.

Xperia l update
Hello guys. I'm new to this forum and i have one simple question.
I have an Xperia L c2105 rooted and with unlocked bootloader. Today when I connected it to my pc i received a notification from PC Companion with an update. I couldn't update it because the program said that I have a modified software or something like that.
Can I update my phone without losing root and with the bootloader unlocked? If i flash the stock rom update do i lose root and my bootloader will be locked?
PS: Sorry for my english, i hope you can help me deal with this...:good:

C'mon guys no one can help me?
Sent from my C2105 using XDA Free mobile app

Ph3n0m3n said:
Hello guys. I'm new to this forum and i have one simple question.
I have an Xperia L c2105 rooted and with unlocked bootloader. Today when I connected it to my pc i received a notification from PC Companion with an update. I couldn't update it because the program said that I have a modified software or something like that.
Can I update my phone without losing root and with the bootloader unlocked? If i flash the stock rom update do i lose root and my bootloader will be locked?
PS: Sorry for my english, i hope you can help me deal with this...:good:
Click to expand...
Click to collapse
Firstly,updates via pc companion or SUS requires lock bootloader..if you have TA backup just restored it and it will be updated officially.
Second...Flashing new firmware will erased everything and your bootloader still will be unlocked if throu flashtool..
Third...when using flashtool, there are a few choices you can make like saving your data and etc but its recommended to wipe everything..
your data etc can be backup using 3rd party app..
The easiest way to root is using extended stock kernel v6 kernel..It has built in root and its binaries..

Thank you very much. I didn't save TA when I unlocked the bootloader so I assume that I can't get it locked. So in this case I will do the update trough flashtool. After flashing the update I will just restore root. Have a nice day
Sent from my C2105 using XDA Free mobile app

przemek4113 said:
No,you won't recive ota and can't update phone using pc companion and sus.You can only update phone using flashtool by flashing a ftf with the system.
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Click to collapse
i have backed up drm using backup ta and a zip file is also saved now when i try to restore some error is coming like protcol fault(read error) please help me how to overcome this problem

How to Create a self rooted Firmware for Xperia Z3 with locked BL?

I already know how to flash with the "Sony Mobile Flasher by Androxyde".
I also know how i can get the latest Firmware for my Device with the XperiFirm Downloader.
I also know how i can update/Upgrade with the Sony Mobile Flasher without Data loss.
But i dont know how i can integrate the Root Files in the Firmware which should be flashed.
What i have:
XPERIA Z3 with locked Boot Loader (Running 23.4.A.1.264)
"PC with Sony Mobile Flasher by Androxyde"
What i want:
A flashable Firmware 23.4.A.1.264 with integrated root without unlocking the bootloader.
So how i can integrate this in my Firmware?

Look in the cross device development section for the PRFCreator thread
And FYI, you will never be able to flash a pre-rooted firmware with flashtool, you have to be already rooted with a custom recovery to flash it.

Downgrade M2 D2303 to KitKat 4.4.4

Hello,
I want to downgrade my Xperia M2 from Lolipop to KitKat 4.4.4
I tried to unlock bootloader, but it says:
Bootloader unlocking allowed: NO
Can someone help me?
Thanks,
Igor

igorrbc said:
Hello,
I want to downgrade my Xperia M2 from Lolipop to KitKat 4.4.4
I tried to unlock bootloader, but it says:
Bootloader unlocking allowed: NO
Can someone help me?
Thanks,
Igor
Click to expand...
Click to collapse
You dont need to unlock your bootloader,just find a ftf and flash it with flashtool...there are many guides on the internet

Thanks for the info, can you provide me a link where I can find official Sony ftf files?
How secure is to use random ftf file from the internet? I use online banking on my phone, so I want to be sure that is secure.

igorrbc said:
Thanks for the info, can you provide me a link where I can find official Sony ftf files?
How secure is to use random ftf file from the internet?
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Click to collapse
There are no "official" ftf's...You can make one by using xperifirm (i doubt the kitkat files are still in the servers)
ftf in xda are trustworthy most of the time

Thanks, can you or someone else send me the theme where I can download the ftf file for my Xperia from xda?

Don't think there is any KK ftf's left on expirifirm Sony usually remove them pretty quickly. There's bound to be one on here somewhere. I think I've still got a pre-rooted KK zip somewhere for the D2303 lte, also I don't know who told you that you need to unlock your Bootloader to downgrade/use flashtool, you don't it'll work on totally stock unrooted devices. You must however wipe user data+cache+appslog when downgrading from lollipop to KK and when Updating from KK to lollipop via flashtool.