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[Q] Question regarding the Xperia J

Right now I have the 4.0.4 Android( stock version) of the xperia j with locked bootloader and I've rooted-it and I've also installed the CWM.
I would like to install Cyanogen Mod 10.1 but since I have the 11.0.A.7.5 firmware I have locked bootloader and I can not flash it.
My question is if I can flash an older stock firmware and by doing so will I be able to unlock my bootloader?
From what I understand right now since I have a locked bootloader I can only flash stock ROMs so if that is correct than can I just flash an older stock ROM, one that will allow me to unlock my bootloader and than flash CM 10.1 on my Xperia J?
And another question- I know that by unlocking the bootloader I will also loose my warranty but from searching the XDA forums I saw that I can make a backup copy of my stock ROM and flash it to relock the bootloader again. Is that accurate ?
Thanks in advance for your help!

First is your bootloader unlockable. Then you can unlock on any firmware via sonys website. I dont think there's a cm10.1 released for j. If you unlock your bootloader you will loose DRM keys forever even if you relock they will still be gone that's how Sony will know your bootloader was unlocked.

It is not unlockable, that is why I wanted to flash another version of a stock ICS.
Won't that allow me to unlock the bootloader ?
From what I understood right now I can only flash stock Roms with the locked bootloader, is it correct or since I have the "NO" status at the bootloader I can't even do any of that ?

[Q] As flashing the boot.img in the Tipo?

Hi, I have the tipe (ST21i) but with the locked bootloader, and I saw that in a post commenting that can install the CM10 flashed the boot.img.
I be able to do it on my phone using flashtool?

no first you have to unlock bootloader from sony website!
complete guide is provided here on the forum!
then only you can flash boot.img and cm10 rom.

Thanks, but the bootloader can not be unlocked, there is another method to unlock it?

if ur bootloader unlock allowed status is no, then presently there is no way to unlock as far i know. developers are looking for a solution to that!

[Q] Xperia E3 stock firmware flashing

Hello, I want to flash my xperia e3 using flashtool to the latest firmware (4.4.4), but all how-to's i read say i have to unlock my bootloader. Must I unlock the bootloader if I plan to flash all generic sony firmware on my phone? My bootloader unlock status says "no."

alex21074 said:
Hello, I want to flash my xperia e3 using flashtool to the latest firmware (4.4.4), but all how-to's i read say i have to unlock my bootloader. Must I unlock the bootloader if I plan to flash all generic sony firmware on my phone? My bootloader unlock status says "no."
Click to expand...
Click to collapse
if you wan,t to flash stock firmware then no need to unlock bootloader.
cause you flash firmware (*.FTF) using flash mode not fastboot(bootloader).
so you don,t have to worry of unlocking bootloader.

ok, thank you for your reply!

[Completed] Re-unlock bootloader sony xperia c3 dual (D2502)

Hi everyone
I have some problem with my brother phone
He bought second xperia c3 dual from him friend
He ask to me to unlock bootloader him xperia c3 dual, i tried unlock using flashtool and via fastboot but not success
i got Device already rooted notice
I think device is unlocked before and locked when flashed stockrom
I check using *#*#7378423#*#* is unlock bootloader allowed: yes
So,, how i can re-unlock bootloader without TA backup ?
Please help and guide me
Thanks

allonid said:
Hi everyone
I have some problem with my brother phone
He bought second xperia c3 dual from him friend
He ask to me to unlock bootloader him xperia c3 dual, i tried unlock using flashtool and via fastboot but not success
i got Device already rooted notice
I think device is unlocked before and locked when flashed stockrom
I check using *#*#7378423#*#* is unlock bootloader allowed: yes
So,, how i can re-unlock bootloader without TA backup ?
Please help and guide me
Thanks
Click to expand...
Click to collapse
Hi,
Have you tried the method in this thread?
https://forum.xda-developers.com/sony-xperia-c/general/guide-root-sony-xperia-c3-dual-d2502-t2973589

rooting

Pls help how to open my bootloader iahace sol26 locked in au my i already check my bootloader it indicate that is unlockable

Use flash tool. It will do the trick