Trying to flash my M4 to older or different ROM so i can unlock bootloader - Sony Xperia M4 Aqua

hi there,
like the title says im trying to flash a different / older/ stock ROM to see if i can unlock the bootloader and or if anyone knows a way i can root my device without the bootloader that would be great too but i think ive expended all my options..... if you can help in any way that would be great! thank you
also i have flashtool downloaded but can not get it to work with my device just keeps saying my bootloader can not be officially unlocked ..... can it be unofficially unlocked?

You have to use the Xperia M2 method to unlock the bootloader as there is still no official way.

There are more than enough guides in other topics where you can read how to unlock your bootloader. First enter the service menu(*"*"service"*"*) and check is it is allowed on your device. If it says 'no' there is no way to unlock. Also if you can unlock don't forget to tick the box in developer options
For root you can afaik just install twrp for locked bootloaders and flash a root (supersu for example)

thanks guys ,
yes i have looked into the tutorials and cannot seem to make it work.
i tried the m2 method and nothing either ..... my bootloader says it cannot be unlocked but ive been reading and apparently there is a way to get around it .... ive successfully flashed different ROMS to try and gain root access too but with no luck
so i guess im asking if anyone has had luck with unclocking there "locked" bootloader on an m4 or if it is even possible at all?
any help is greatly appreciated

Related

[Q][SK17i]Any chance to flash CFW with locked Bootloader?

Hy!
I have an easy question. Some people have Branded SK17i, which says: Bootloader Unlock allowed: NO...
So, any chance to flash this without unlock Bootloader? I thinking in a method like Motorola phones (Defy, etc).
Any chance to work this?
Thanks a lot!
I think i fell upon someone who had the same issue. I think you have to debrand it first, then you will be able to unlock the bootloader using the Test Point method. Not entirely sure though.
What you can do is go through this thread http://forum.xda-developers.com/showthread.php?t=1285285
I am quite certain that there was a solution in that thread somewhere.
No way. In service menu i got: "Bootloader unlock allowed: No". I debranded it with Wotan (2.3.4 UK ROM), but i can't unlock bootloader.
I think it's not a problem, because a lot of Motorola has locked bootloader, and they have CFW.
We can root it, with zergRush, we only need a xRecovery or CWM Recovery port, and we got Highway to Hell
Interest thing: after S1tool Method in the i saw "r9xxx", not "R9xxx". In X10 Mini/Mini Pro it means the unlocked bootloader. So what?
If you checked the thread thoroughly you would have got your answer.
http://forum.xda-developers.com/showpost.php?p=18868348&postcount=103
Hope this clears the waters for you
Yep, I know this way, but I want to make an method, which don't need unlocked bootloader, like Motorola Phones.
Umm.... What? Motorola phones are hated because of their locked bootloader, resorting to a software solution to bypass the bootloader lock in order to get it to "fastboot" can only resort to problems.
Plus, ROMs in Motorola phones work way differently, you have to restore a cwm backup and then install the rom blah blah blah.
So its not easier in any way.
guys, here is the solution to unlock bootloader via testpoint method.
clear and easy to follow.
http://forum.xda-developers.com/showpost.php?p=18013064&postcount=44
this will help a lot of people if you succeed...
i do not understand why only some phones of the same model have bootloader unlock allowed:no
good luck
Nice bump, dude.
Last post before you was 4/11/2011...
Someguyfromhell said:
Nice bump, dude.
Last post before you was 4/11/2011...
Click to expand...
Click to collapse
eh ****..
how did i get here?

[Q] Bootloader Unlock Problem

Couple of things you might need to know
I've searched EVERYWHERE and not found an answer
Phone IS ROOTED
Phone is: Xperia RAY
its GSM Locked
Bootloader Unlock Allowed: NO
Now thats cleared my problem
I've searched loads of places (including here) to find a way to unlock my bootloader, the official method does not work (the one through Sony's website) as my phones bootloader is not allowed to be unlocked
So the obvious question is, how do i unlock the bootloader?
There are many threads about that. You can try the paid method via "wotan server", but nobody can promise it will work
Try Setool. I haven't used it but some people say it can unlock bootloaders. http://files.setool.net/support/SETool2/
gaza1994 said:
Couple of things you might need to know
I've searched EVERYWHERE and not found an answer
Phone IS ROOTED
Phone is: Xperia RAY
its GSM Locked
Bootloader Unlock Allowed: NO
Now thats cleared my problem
I've searched loads of places (including here) to find a way to unlock my bootloader, the official method does not work (the one through Sony's website) as my phones bootloader is not allowed to be unlocked
So the obvious question is, how do i unlock the bootloader?
Click to expand...
Click to collapse
you can try testpoint method
you can unlock via setool, testpoint method, but if your phone says: Bootloader Unlock Allowed: NO then the fastboot mode is disabled, so you can not flash custom kernels even you unlocked it
the only way is a paid method like wotanserver, which i used a year ago and i recommend it

[Q] Xperia Z Ultra bootlloader/Root questions

Hello everyone.
I had posted this in the Z forum, not realizing there was a Z Ultra forum. So I will just quote my previous post and add some info at the end:
Hello guys. New guy here with an Xperia Z Ultra phone.
I'm trying to load the Paranoid Android custom ROM.
Had a couple of questions:
1. I went thru Sony's instructions to unlock the bootloader. When I ran the fastboot -i 0x0fce oem unlock (e-mail code), the first error message I got was "FAILED - Remote - Command did not succeed". So I tried the exact command again, and then I got "FAILED - Remote: The device is already rooted".
I have searched high and low, and cannot seem to find any way to verify that the bootloader is now in fact unlocked.
2. Reading the instruction on how to install CWM/TWRP recovery menus, Every single list of instructions includes the following "This tutorial is only for Sony Xperia Z Ultra with 510 and 493 LTE firmware. Do not use it for any other carriers or variants"
Again, I have searched high and low to find a way to confirm what firmware version I have. All I know is I have the C6806 model, with the build number: 14.2.A.0.290
So can someone please help out a very confused guy here? I don't want to brick my phone by accident
So far it's still working ok
Click to expand...
Click to collapse
So far, after doing some major searching, I seem to have found that I currently have "290" Firmware, and that this Firmware is currently NOT able to be rooted. Is this correct?
Also, I still have not found a way to verify wether the boot loader actually did unlock or not. From what I have been able to read, it seems that if a proper boot loader was in fact, unlocked, it would have wiped all the data on my phone along with the SD card data.
So far, it seems everything on my phone is intact. So does this mean the boot loader unlock command failed for me? If so, why did I get the reply "this device is already rooted?"
I can't believe how difficult it is to root a damn Android phone! Jailbreaking an Apple device is 10 times easier!
First of all, it's usually pretty easy to root Android devices. In most cases it's only a simple click, but sony has done a good(?) job at fixing exploits, so it does it much harder for us.
Second, you can check if your bootloader is locked or unlocked by opening the dialer and insert *#*#7378423#*#*, go to "Service Info" and then "Configuration". If your bootloader is unlocked, it should say "Rooting status: Bootloader unlocked: Yes". It's easier to use Flashtool to unlock the bootloader if you're having issues using a terminal.
You'll find the rest here (including bootloader unlocking). If you need some help, ask in that thread.
If you aren't boot loader unlocked then "BACKUP TA PARTITION" from My Lord's guide @LordManhattan
Just incase you need to re-lock it for service
LordManhattan said:
First of all, it's usually pretty easy to root Android devices. In most cases it's only a simple click, but sony has done a good(?) job at fixing exploits, so it does it much harder for us.
Second, you can check if your bootloader is locked or unlocked by opening the dialer and insert *#*#7378423#*#*, go to "Service Info" and then "Configuration". If your bootloader is unlocked, it should say "Rooting status: Bootloader unlocked: Yes". It's easier to use Flashtool to unlock the bootloader if you're having issues using a terminal.
You'll find the rest here (including bootloader unlocking). If you need some help, ask in that thread.
Click to expand...
Click to collapse
First of all it' pretty damn complicated and unrewarding to root a Sony device. Not all android but Sony definately. We checked, bootloader is unlockable. We unlocked and relocked bootloader prevoiusly because there is no robust, easy-to-install ROM for ZU. But time to time we try to root it.
Now, the question is the same: what should we do to re-unlock the bootloader if anything is OK, but flashtool says "Command did not succeed" for the first time and "Device is already rooted" for subsequent times at unlocking?
Please write some advice about the question, not about TA backup and your success. Thx!
Champdor said:
First of all it' pretty damn complicated and unrewarding to root a Sony device. Not all android but Sony definately. We checked, bootloader is unlockable. We unlocked and relocked bootloader prevoiusly because there is no robust, easy-to-install ROM for ZU. But time to time we try to root it.
Now, the question is the same: what should we do to re-unlock the bootloader if anything is OK, but flashtool says "Command did not succeed" for the first time and "Device is already rooted" for subsequent times at unlocking?
Please write some advice about the question, not about TA backup and your success. Thx!
Click to expand...
Click to collapse
Oh, are we demanding help now?
Bootloader unlocking is a straight forward process. I've had a couple of strange errors in Flashtool while trying to unlock the bootloader, but just close Flashtool and try again. Also be sure to be on the latest version of Flashtool.
LordManhattan said:
Oh, are we demanding help now?
Bootloader unlocking is a straight forward process. I've had a couple of strange errors in Flashtool while trying to unlock the bootloader, but just close Flashtool and try again. Also be sure to be on the latest version of Flashtool.
Click to expand...
Click to collapse
No sir, not at all. I wrote please, no demanding. Well yes, I'm a bit picky because there were no answer and I usually find some on XDA. Besides I used custom roms on Samsung devices for years (SGS2, SGN, SGN2) and I was disapponted when I bought my XZU that there are very few roms and I couldn't use them (I managed with very hard work to go back to stock in 9 hours after unsuccesful flashing).
So there is some basic problem every time. Like trying to root but cannot re-unlock because of some mysterious errors with no solutions.
Enough of my problems, your answer is much appreciated, will try to re-unlock some time. Thx!
Champdor
Champdor said:
No sir, not at all. I wrote please, no demanding. Well yes, I'm a bit picky because there were no answer and I usually find some on XDA. Besides I used custom roms on Samsung devices for years (SGS2, SGN, SGN2) and I was disapponted when I bought my XZU that there are very few roms and I couldn't use them (I managed with very hard work to go back to stock in 9 hours after unsuccesful flashing).
So there is some basic problem every time. Like trying to root but cannot re-unlock because of some mysterious errors with no solutions.
Enough of my problems, your answer is much appreciated, will try to re-unlock some time. Thx!
Champdor
Click to expand...
Click to collapse
Oh, i get that. I came from Samsung myself, and this is my first Sony device ever, so I've had some issues myself. I've gotten the same error message(s) as you before, and i think i restarted Flashtool and rebooted my Ultra and it was back to normal again - i think, but it "fixed itself" after trying a couple of times, so don't give up. It's also important to always be on the latest version of Flashtool.
It would also help us if you could tell us what you're trying to achieve, so you don't end up spending 9 hours on something that takes 5 minutes
@Champdor
From what I can make out you have never managed root your phone or back up the TA. If the latter is true then there is very little point in relocking the bootloader.
Yes the process is a little harder than Samsung, but the last device I rooted was a ZTE, and that was even harder to root and flash from what I can remember (yes this is my first Sony device as well, and I will buy another...)
Take you time and read the stickies that we have written and all should go well. Don't be afraid to ask (intelligent) questions if you get stuck, and read some more
HELP!
i am in same situation as OP
in past, i unlocked the bootloader then i relocked.
now I like to re-unlock. but I get same errors (i.e. 'command did not suceed' or 'device is already rooted')
i check service menu and it says 'bootloader unlock allowed: yes' meaning its not unlocked yet.
i use latest flashtool and try to unlock but i get error
can any expert help!?
thanks for your help
corrado85 said:
HELP!
i am in same situation as OP
in past, i unlocked the bootloader then i relocked.
now I like to re-unlock. but I get same errors (i.e. 'command did not suceed' or 'device is already rooted')
i check service menu and it says 'bootloader unlock allowed: yes' meaning its not unlocked yet.
i use latest flashtool and try to unlock but i get error
can any expert help!?
thanks for your help
Click to expand...
Click to collapse
I have not had this error so have not tested this, but what happens if you flash a full FTF and wipe everything then try to unlock the BL?
And remember that you can take a backup of the unlocked BL (re member to name it as such) and just flash that to unlock again. Doing it this way you don't get the format that happens when using the unlock code.
I followed this post to downgrade, root, i use Backup TA v9.10 to backup DRM Keys, use Flashtool 0.9.14.0 to unlock Bootloader, then to flash other Rom's (stock and customs), came back to Stock Rom .681, relock the Bootloader with Flastool 0.9.15.0 flashed the last .757 and unlock the Bootloader again with no kind of problems using Flashtool 0.9.15.0....
blueether said:
I have not had this error so have not tested this, but what happens if you flash a full FTF and wipe everything then try to unlock the BL?
And remember that you can take a backup of the unlocked BL (re member to name it as such) and just flash that to unlock again. Doing it this way you don't get the format that happens when using the unlock code.
Click to expand...
Click to collapse
I just flashed C6802 .757 FW using flashtool, and i get same issue
is there a tutorial about backup of the unlocked BL? assuming you meant I have to have own device backup..
this is so confusing at the end :crying:
corrado85 said:
I just flashed C6802 .757 FW using flashtool, and i get same issue
Click to expand...
Click to collapse
I dont know what else to suggest other than rebooting every thing and reinstalling all the drivers
is there a tutorial about backup of the unlocked BL? assuming you meant I have to have own device backup..
this is so confusing at the end :crying:
Click to expand...
Click to collapse
You just back it up as you would for a locked BL. Just remember to make sure you name them well so you know which is the locked one and the unlocked one.
NEVER use a TA backup from another phone, you WILL HARD BRICK IT
Lc1975 said:
I followed this post to downgrade, root, i use Backup TA v9.10 to backup DRM Keys, use Flashtool 0.9.14.0 to unlock Bootloader, then to flash other Rom's (stock and customs), came back to Stock Rom .681, relock the Bootloader with Flastool 0.9.15.0 flashed the last .757 and unlock the Bootloader again with no kind of problems using Flashtool 0.9.15.0....
Click to expand...
Click to collapse
problem is i get message 'device already rooted' when i enter my bootloader key using flashtool as well
---------- Post added at 03:42 PM ---------- Previous post was at 03:40 PM ----------
blueether said:
I dont know what else to suggest other than rebooting every thing and reinstalling all the drivers
You just back it up as you would for a locked BL. Just remember to make sure you name them well so you know which is the locked one and the unlocked one.
NEVER use a TA backup from another phone, you WILL HARD BRICK IT
Click to expand...
Click to collapse
ahh ok, in that case, i do not have a backed up unlocked bootloader rom
corrado85 said:
problem is i get message 'device already rooted' when i enter my bootloader key using flashtool as well
---------- Post added at 03:42 PM ---------- Previous post was at 03:40 PM ----------
ahh ok, in that case, i do not have a backed up unlocked bootloader rom
Click to expand...
Click to collapse
Did you tried:
*#*#SERVICE#*#*
and confirm that the Bootloader is unlock?
Lc1975 said:
Did you tried:
*#*#SERVICE#*#*
and confirm that the Bootloader is unlock?
Click to expand...
Click to collapse
It states
Rooting status
Bootloader unlocked allowed:Yes
corrado85 said:
It states
Rooting status
Bootloader unlocked allowed:Yes
Click to expand...
Click to collapse
When you try to unlock the Bootloader.. What button or icon do you click?
The one who has the padlock or BLU?
Lc1975 said:
When you try to unlock the Bootloader.. What button or icon do you click?
The one who has the padlock or BLU?
Click to expand...
Click to collapse
I choose which states 'BLU'
actually I do get the option to click on padlock but i dont know what to do there
corrado85 said:
I choose which states 'BLU'
actually I do get the option to click on padlock but i dont know what to do there
Click to expand...
Click to collapse
The padlock is to root the device..
Sorry but i can't help you much more then this... I don't have much knowledge to go foward...
Try to start from scratch..
Downgrade...
Root...
Try to unlock the Bootloader
And update to the latest...
root didnt work
Hello , i want to root my phone z ultra 6833 .757 i watch this video youtube . com/watch?v=uFSeSe8gQOY
i unlock bootloader after this install 757.img by flashtool so i can open recovery but after this i didnt find the same file he run i try run supersu.zip but the phone havent rooted plz what the problem

[ST27i] [Xperia Go] [Bootloader] [CM12.1] [HELP]

A while back I unlocked the bootloader on my Xperia Go, or so I thought. When trying to flash new kernal, it gave me the error that the device must be rooted first. Since it has already been rooted, and I've seen posts about people having the same problem, I determined that the bootloader was the issue. There is no way to unlock this bootloader other than officially as far as I'm aware. Using the dialer to access the secret menu, it says that the bootloader is allowed to be unlocked, and other people have done it, even custom ROMS have been created, however, on the Sony website to get an unlock code, the device is not listed. Any information of how to unlock the bootloader on this device would be greatly appreiciated!
Having the same problem. Seems they removed the support for Xperia GO. Anyone got any ideas on obtaining the code? Is there any other way to unlock the bootloader?
hi, did you solve the problem somehow?
Here described the solution
https://www.youtube.com/watch?v=PMm_kULD9LY
for more infos, latest ROM, read here:
http://forum.xda-developers.com/xpe...cyanogenmod-12-0-t3013681/page56#post67172049

Installing TWRP without unlocked BL

Hey guys, I have a xiaomi redmi note 3 pro kate running global developer version of miui 8.
I applied for permission of bootloader unlocking on the 30th of December. Ive been waiting for over 12 days and I'm still getting the notorious "couldnt verify device" . I have tried every single tips, tricks, methods thats available on numerous forum threads. None of them work. Don't bother suggesting me a "way" to unlock my bl thats "100% guranteed" cuz honestly i've given up hope. I dont want to unlock in the unofficial way either.
I read a thread here that says it's possible to flash twrp, root and flash all kinds of roms without unlocking the bl.
Could you guys maybe guide me through what i need to do to flash twrp and root? what do i need to do?And again, I have a kate.
yeah i want too flash root and stuff's without unlock bootloader, i have SD version of RN3, btw!

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