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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 ?

Downgrade driod ultra?

I have rooted motorola driod ultra device on 4.4.4 kitkat
system version is
24.13.3.obake_verizon
build number
su6-7.3
Can i downgrade to jellybean...plz.

Downgrades are impossible without unlocked bootloader AFAIK
And the highest version that can unlock the bootloader currently is su4.21
All you can do is use crashxxl's trick to downgrade to su6-7(.0) and then you can use xposed

_ck_ said:
Downgrades are impossible without unlocked bootloader AFAIK
And the highest version that can unlock the bootloader currently is su4.21
All you can do is use crashxxl's trick to downgrade to su6-7(.0) and then you can use xposed
Click to expand...
Click to collapse
I have perm root and bt unlocked with sunshine and i am on SU4.21, i have 4.4.4. and I would like to go back to 4.2.2. Will you help me downgrade?

AFAIK, downgrading from 4.4 to 4.2 would most likely brick the phone unless you leave the 4.4 bootloader and downgrade the other files. But I don't know how stable with the phone running 4.2 on 4.4 bootloader, probably not very.
Sent from my XT1080 using Tapatalk

Can't rollback to Android MM to relock bootloader

Hello,
A few days ago I managed to go back to a stock rom from a custom one. I have a FRD-L09432B360 firmware at the moment, but the bootloader is unlocked. I don't remember the code I used to unlock the bootloader, and I'd like to relock the bootloader so I am able to update to the latest firmwares. I've read that by downgrading to Marshmellow the bootloader will relock itself.
I am following this guide to do so, but when I reboot to apply the UPDATE.APP of the rollback package, it get stucks on 5% for a while, and after a few minutes it reboots, leaving me with the same firmware.
Is there something I am doing wrong?
Is there another way to relock the bootloader without the unlocking code?
Thanks a lot,
Mcat

I still haven't been able to fix this issue? Any idea is appreciated, thanks

You don't need to relock the bootloader to update. Use hurupdater

Unlock bootloader v4?

Is there anyway to get an unlocked bootloader? I am still running stock nougat with bootloader v4. Can I flash G930U and unlock bootloader that way? I really just want to install custom ROMS. I have no need for regular root.

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Can I downgrade PIE to Oreo on U11 Dual SIM?

My device: U11 Dualsim Global version runing PIE 3.31.401.1 firmware.
Rooted, cusom recovery, unlocked BL.
2 choise I want to do:
1. un-root, relock BL, back to stock Recovery on PIE.
or
2. downgrade to Oreo, relock BL.
anyone help me!

loveuhp said:
My device: U11 Dualsim Global version runing PIE 3.31.401.1 firmware.
Rooted, cusom recovery, unlocked BL.
2 choise I want to do:
1. un-root, relock BL, back to stock Recovery on PIE.
or
2. downgrade to Oreo, relock BL.
anyone help me!
Click to expand...
Click to collapse
-check you CID
- Download RUU from here --->
- Use RUU Flash method to restore system