Database Develop

[Q] Downgrading on locked bootloader

Hi guys!
I have searched the forum and I DO have got a lot of answers. But still I want to get some things clear before I go on.
I just got myself an Xperia Z. It was already updated to 4.3 .569. The phone has a locked bootloader and I found out that it CAN´T be unlocked. So there I´m stuck.
I was first thinking about following this guide: http://forum.xda-developers.com/showthread.php?t=2590088
But then I got some more questions.
If I downgrade according to that guide... since I get a custom recovery, can I flash any custom ROM that is made for locked bootloader? Do I even have to use the 4.3 .569 used in the thread above or can I just downgrade and root then choose the ROM to my liking?
Thanx for all your help!

Downgrading
Dear friend:
1-the easy way::laugh:
2-Flash 4.2.2 with flash tool
3-Root on locked boot loader
4- Install Dual Recovery follow
5- Install 4.3/4.2 Pre-rooted or any other rom of your choice.

Once you've downgraded, rooted and have a custom recovery, you can use any rom you like, as long as it's a stock based rom for locked bootloaders.
You cannot flash anything based on CM/PAC/AOSP/AOKP etc as they require a custom kernel and therefore an unlocked bootloader.
Sent from my C6603 using Tapatalk

alfi07 said:
Dear friend:
1-the easy way::laugh:
2-Flash 4.2.2 with flash tool
3-Root on locked boot loader
4- Install Dual Recovery follow
5- Install 4.3/4.2 Pre-rooted or any other rom of your choice.
Click to expand...
Click to collapse
Just as I suspected! Have been away from Xperias for a while so I just needed someone to give me a nudge in the back!
Thanx alot, mates!

You're welcome.
Sent from my C6603 using Tapatalk

[help] need infos on latest rom and latest root method

hello I am an old Z user , but it got stolen 6month ago...
I just got a new one, I'm not a noob but I'm lost on what is the latest rom to install and the proper way to root it as I'm sure old methods aren't working anymore...
from what I roughly understood, you need to unlock the bootloader now?
if yes I would need help on that!
(I heard about some "framework" stuff to install as well)
thanks for helping !

dave_id said:
hello I am an old Z user , but it got stolen 6month ago...
I just got a new one, I'm not a noob but I'm lost on what is the latest rom to install and the proper way to root it as I'm sure old methods aren't working anymore...
from what I roughly understood, you need to unlock the bootloader now?
if yes I would need help on that!
(I heard about some "framework" stuff to install as well)
thanks for helping !
Click to expand...
Click to collapse
latest ROM is 4.3 - build number 10.4.1.B.0.101
You only need an unlocked bootloader if you want custom ROMS such as CM, PAC etc with custom kernels. Cant flash custom kernels if on locked bootloader
Unlock bootloader - http://forum.xda-developers.com/xperia-z/development/tutorial-xperia-z-zl-bootloader-t2153261
To root you will need to be on a 4.2 ROM, once rooted you can install a recovery then you can install a rooted 4.3 ROM or custom ROM
Follow this method to root on stock rom - http://forum.xda-developers.com/showthread.php?t=2327472
(additional guide - http://forum.xda-developers.com/xperia-z/development/guide-how-to-root-101-firmware-lb-t2656698)
Follow this method to gain recovery - http://forum.xda-developers.com/xperia-z/general/ub-lb-xzdualrecovery-xperia-z-qa-thread-t2477769
Should be ready to flash stuff

thanks a lot!!!
was lost into all the new infos...
so to install 4.3 - 10.4.1.B.0.101 no need to unlock, right?
(I only need the sony rom)

dave_id said:
thanks a lot!!!
was lost into all the new infos...
so to install 4.3 - 10.4.1.B.0.101 no need to unlock, right?
(I only need the sony rom)
Click to expand...
Click to collapse
Correct, you do not need to unlock the bootloader if you are going to install the 4.3 - 10.4.1.B.0.101 ROM.
You can either do this on flashtool by flashing a 4.3 FTF or you can root and install recovery and flash a rom zip file

[Q] Can i flash a rom in locked BL?

Hello, i have an Xperia Z1 C6906, and it has locked bootloader, but i rooted it and flashed dual Recovery. If i want to install a custom rom in recovery just like most of the devices is possible? or i have to use the flash tool on the pc?
I just want to install a AOSP rom, im sick of Sony UI.

alexmurr152 said:
Hello, i have an Xperia Z1 C6906, and it has locked bootloader, but i rooted it and flashed dual Recovery. If i want to install a custom rom in recovery just like most of the devices is possible? or i have to use the flash tool on the pc?
I just want to install a AOSP rom, im sick of Sony UI.
Click to expand...
Click to collapse
If you want to flash an aosp rom, then you would have to unlock your bootloader and flash the rom through recovery

alexmurr152 said:
Hello, i have an Xperia Z1 C6906, and it has locked bootloader, but i rooted it and flashed dual Recovery. If i want to install a custom rom in recovery just like most of the devices is possible? or i have to use the flash tool on the pc?
I just want to install a AOSP rom, im sick of Sony UI.
Click to expand...
Click to collapse
Yes you can install custom rom but need to be based on Sony firmware
For AOSP ROM you need to unlock the bootloader & flash it through recovery
Flashtool is to use for flashing stock ftf

Ben Ling said:
Yes you can install custom rom but need to be based on Sony firmware
For AOSP ROM you need to unlock the bootloader & flash it through recovery
Flashtool is to use for flashing stock ftf
Click to expand...
Click to collapse
So there is no way to me for installing an AOSP rom? my Z1 is not allowed to unlock Bootloader

alexmurr152 said:
So there is no way to me for installing an AOSP rom? my Z1 is not allowed to unlock Bootloader
Click to expand...
Click to collapse
No.

alexmurr152 said:
Hello, i have an Xperia Z1 C6906, and it has locked bootloader, but i rooted it and flashed dual Recovery. If i want to install a custom rom in recovery just like most of the devices is possible? or i have to use the flash tool on the pc?
I just want to install a AOSP rom, im sick of Sony UI.
Click to expand...
Click to collapse
well u can still find another launcher for your z1 and use Xposed framework to modify a lot of things since u have rooted
custom rom like CM is a (slightly) more experimental stuff and are usually used by people with more experience in android.
not recommended for u at the moment bro (well u cant unlock anyway)

how to root zr 4.3?

is it possible to root zr with 4.3 updates?
im on locked bootloader. should i unlocked my bootloader? if so, how?
please help me this is urgent. i need to root my zr asap to be able to restore my app data. really important

w1040 said:
is it possible to root zr with 4.3 updates?
im on locked bootloader. should i unlocked my bootloader? if so, how?
please help me this is urgent. i need to root my zr asap to be able to restore my app data. really important
Click to expand...
Click to collapse
i don't recommend you to unlock bootloader as there's many steps to do which takes time.
so you will just need to downgrade to 4.2.2 firmware by flashing the ftf,then root it & install custom recovery,after that flash a pre-rooted 4.3 rom.

Ben Ling said:
i don't recommend you to unlock bootloader as there's many steps to do which takes time.
so you will just need to downgrade to 4.2.2 firmware by flashing the ftf,then root it & install custom recovery,after that flash a pre-rooted 4.3 rom.
Click to expand...
Click to collapse
too late. i already unlocked my bootloader. but after i unlocked it, my phone on bootloop but i managed to enter cwm. the 'free xperia' and 'xperia' logo keeps coming out if i try to boot my phone. looks like im on a wrong firmware to unlock my bootloader.
now im downloading (C5502) 10.4.B.0.569 tft files and flash it via flashtool, then im gonna try to again if my phone will boot or not.

@Ben Ling
I am new this rooting to. And I want to install a custom rom on my Xperia ZR. How do I downgrade to the previous ROM? Do I just use the flash tool? Is it necessary to backup my TA partition during this process or can I do it when I am about to root the device?Thanks!

samavedam_vijay said:
@Ben Ling
I am new this rooting to. And I want to install a custom rom on my Xperia ZR. How do I downgrade to the previous ROM? Do I just use the flash tool? Is it necessary to backup my TA partition during this process or can I do it when I am about to root the device?Thanks!
Click to expand...
Click to collapse
download the 4.2.2 ftf,flash it then root it & install recovery
then flash custom rom (only based on 4.3 & stock firmware)

Thank you
So basically these are the steps which I need to perform
1)Download and run flash tool
2)Download the correct ftf and flash it via flash tool
3)Root the phone using doomlord's vroot kit
4)Backup the TA partition
5)Unlock the bootloader
6)Install custom rom
Please confirm if these are the steps to be followed
Thanks!

If you only want root you dont need to unlock bootloader and backup TA.
Sent from my C5503 using XDA Premium 4 mobile app

hans3103 said:
If you only want root you dont need to unlock bootloader and backup TA.
Sent from my C5503 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
I live in India so would there be an India specific rom(Stock) for my phone?

@Ben Ling I rooted my zr by flashing 4.1.2 . I have also backed up the TA partition. Can you please suggest any good ROMS now? What should I choose stock based ROMS or AOSP roms like Carbon?
Also, If I want to come back to stock ROM(4.3) again what should I do?
Thanks!

samavedam_vijay said:
@Ben Ling I rooted my zr by flashing 4.1.2 . I have also backed up the TA partition. Can you please suggest any good ROMS now? What should I choose stock based ROMS or AOSP roms like Carbon?
Also, If I want to come back to stock ROM(4.3) again what should I do?
Thanks!
Click to expand...
Click to collapse
if you want 4.4,then just try the carbon rom
for 4.3,try this.. http://forum.xda-developers.com/showthread.php?t=2726463
for back to stock,you will just need to backup your current 4.3 rom,then if you want to restore,just restore
but the backup will only restore by using the same recovery that you backup.

@Ben Ling Thankyou! One more question before I installed the 4.3 ROM which you mentioned, do I need to unclock the bootloader to install the ROM?

samavedam_vijay said:
@Ben Ling Thankyou! One more question before I installed the 4.3 ROM which you mentioned, do I need to unclock the bootloader to install the ROM?
Click to expand...
Click to collapse
no

[Q] How to root my phone

Ok, it's not like I didn't had search how to do it, it's just that so far my search has been very frustrating.
First, my phone has stock rom, v. 12.1.A.1.201 with JB 4.3. And I just want to flash a stock rom (maybe a little tweak to make it smooth and faster) + root.
So I searched (maybe not too good) how to do it, and I found this: to install any rom, you need to have an unlocked bootloader, so far so good, but then when you search on how to unlock it, surprise! you need to be root to backup drm keys ... Ok then, I tried another aproach, maybe flashing from custom recovery, but then again to install a custom recovery you need to be rooted ... back to the begining.
So if anyone can enlighten on how to fulfill my very reasonable request, I would be sooo happy.

No need to unlock bootloader in order to flash stock based ROMs or for rooting. But for flashing custom kernels/ROMs that need a custom kernel, unlocked BL is a must.
There are many guides. Check through this index.
http://forum.xda-developers.com/showthread.php?t=2618222
It's sticky btw
Basically you have to (because you're locked BL),
1. Downgrade to 4.1.2
2. Root with DoomLord method.
3. Install recovery.
4. Flash a pre-rooted 4.3 ROM (.201) through recovery. Flash SuperSU update at the same time. Shutdown phone (NOT reboot).
5. Flash stock 4.3 kernel (.201) via flashtool.
6. Done. On rooted .201. Then install a recovery (because previous recovery got erased with ROM flashing).
#Details in guides. Good one here: http://forum.xda-developers.com/showthread.php?t=2727143
**Optional: Do a TA partition backup and keep it safe. Someday you can unlock the BL

You can follow mrhnet's post that helped me solve my dilemma! You can downgrade your phone, exploit root, flash recovery, flash SuperSU and then backup TA. Once TA backed up, the freedom is finally yours!
Here's a link: http://forum.xda-developers.com/showpost.php?p=51005416&postcount=10

Can someone please help me..
I have an Xperia SP currently running 4.1.2 rooted, bootloader locked.
My aim is to upgrade to 4.3.3 and root, for which i will have to unlock the bootloader. To do so I need a TA partition backup , for which again, root is required.
So, my question is that is it okay if I take a TA Backup now [in 4.1.2] and then upgrade OTA and unlock bootloader, root and then restore the 4.1.2 TA backup onto 4.3.3 in order to restore DRM keys and Relock the bootloader?
Has anyone done this?
is it safe?
Sent from my C5302 using Tapatalk

Why don't you install a recovery and after that flash a pre-rooted 201???
Sent from my C5303 using XDA Free mobile app

Vforvanadium said:
Can someone please help me..
I have an Xperia SP currently running 4.1.2 rooted, bootloader locked.
My aim is to upgrade to 4.3.3 and root, for which i will have to unlock the bootloader. To do so I need a TA partition backup , for which again, root is required.
So, my question is that is it okay if I take a TA Backup now [in 4.1.2] and then upgrade OTA and unlock bootloader, root and then restore the 4.1.2 TA backup onto 4.3.3 in order to restore DRM keys and Relock the bootloader?
Has anyone done this?
is it safe?
Sent from my C5302 using Tapatalk
Click to expand...
Click to collapse
You don't have to unlock bootloader. You can flash a prerooted rom with built in 201 stock kernel
Verstuurd vanaf mijn C5303 met Tapatalk

Nanostray said:
You don't have to unlock bootloader. You can flash a prerooted rom with built in 201 stock kernel
Verstuurd vanaf mijn C5303 met Tapatalk
Click to expand...
Click to collapse
How ? Link please.
Sent from my C5302 using Tapatalk

Vforvanadium said:
How ? Link please.
Sent from my C5302 using Tapatalk
Click to expand...
Click to collapse
Just go to the Android development section, and you'll find plenty. You can also choose to flash a stock based rom. I went from 254 to existenz 3.3.0 (which is 201)
Verstuurd vanaf mijn C5303 met Tapatalk

For downgrading see my tutorial in link below (flashing with flashtool)
For rooting that 4.1.2 see: http://forum.xda-developers.com/showthread.php?t=2440375
and for CWM installation see: http://forum.xda-developers.com/showthread.php?t=2649923
I'd love to see you guys use search a bit more! This question has been asked a lot