[Question][Xperia M4 Aqua]Bootloader unlock allowed: No after flash FTF - Sony Cross-Device General

Hi everyone!!
I have a big problem (or little)!!
I have an Xperia M4 Aqua with "Bootloader unlocked allowed: Yes" originally, and I unlocked bootloader. When I was trying to root (Marshmallow firmware 26.3.A.0.131) , i somehow bricked my phone, and I reflash stock firmware (Marshmallow) to repair brick and my bootloader becomes "Bootloader unlock allowed: No" :crying:
What's the reason? How to change "Bootloader unlock allowed: No” to Yes?
Thank's and sorry for my bad english
P.S. I found same case on Xperia P (JellyBean?) on the next link:
http://talk.sonymobile.com/t5/Android-development/Bootloader-unlock-allowed-No-SONY-solve-it-please/td-p/181271/page/8

Did you try to recover via pc companion instead of flashtools?

Yes, but nothing happening...
Before this, my bootloader status was rooting but after flash stock rom, my bootloader he locked and "Bootloader unlocked allowe: NO"

Thread closed. The cross-dev section is not the place to ask questions
We have a forum for the m4 aqua, ask there

Related

[Q] Where to go from here?

Hi,
I have a brand new Sony Ericsson UK Xperia Play on Android 2.3.3, Build: 3.0.1.A.0.145. (Latest T-Mobile OTA Update).
I want to:
Root my phone and Try out Cyanogeon Mod
Am I correct in thinking that to root my phone I need to unlock my bootloader or do i need to downgrade somehow?
Thanks,
XperiaPlayer
If your device is sim locked, you cannot unlock the bootloader, without an unlock bootloader, you must downgrade in order to root, check out the stickies in the android development forum
Sent from my R800i using Tapatalk
Right,
So to get it rooted it would be better to downgrade?
Regarding the sim-unlock thing, when I put the IMEI into sony's website it gave me an unlock code? (However Im going to try an orange sim in it)
Also to downgrade is it simple (As in through SEUS) or would one be better off unlocking the bootloader and flashing a rooted kernel?
Thanks,
XperiaPlayer
XperiaPlayer said:
Right,
So to get it rooted it would be better to downgrade?
Regarding the sim-unlock thing, when I put the IMEI into sony's website it gave me an unlock code? (However Im going to try an orange sim in it)
Also to downgrade is it simple (As in through SEUS) or would one be better off unlocking the bootloader and flashing a rooted kernel?
Thanks,
XperiaPlayer
Click to expand...
Click to collapse
To root you do not need an unlocked bootloader, but for you to install CM7 you do need an unlocked bootloader.
If you unlock your bootloader you will not get updates from SE (SEUS, OTA or Pc Companion if you try to use any of them after unlocking your bootloader it will brick your phone) you will have to come to this fourm for the updates. Plus it will void your phones warranty but you can now relock the bootloader thanks to blagus so i suppose that doesn't matter really.
You can try unlocking your bootloader (worth a try if you cannot get another sim? it will either fail or succeed), follow the guide here. Or follow the steps on the SE website. If it works you do not need to downgrade since you can install any of the rooted .img's or custom kernels e.t.c which are on 2.3.3 and are rooted.
If you cannot unlock your bootloader you can still root but you will have to downgrade to 2.3.2 using flashtools.
You can only root (with a locked bootloader) on on 2.3.2 since gingerbreak does not work on 2.3.3 (its been patched). So if you want root on 2.3.3 you will have to flash 2.3.2 then root then do the ota update. Follow the guide here to root with a locked bootloader.
Using flashtools to downgrade is the exact same as using SEUS really (both need the phone off and to be connected in flash mode).

[Q] update to official firmware after rooting and unlocking bootloader

hi, every xperia play owners in this forum, my this thread is for a noob question i just wanted to know would i will be able to upgrade to official 2.3.4 firmware without flashing process after i had unlocked my bootloader, rooted and have flashed dooms kernel on it ?? will it brick my phone or i hav to relock bootloader ??
Updating normally will brick the phone with an unlocked bootloader. You would need to re-lock it or flash the ROM manually.
Sent from the best phone ever

[Q] Is my bootloader unlocked or not?

I have a note 3 N9005 with custom rom and recovery. I want to install the official the lollipop frimware but it needs an unlocked bootloader.
So How can i know if my bootloader is unlocked ?
Thanks in advance
Edit : The firmware needs unlocked phone not unlocked bootloader , I read it wrong. but still how can i know the status of my bootloader
try THIS
:good:

Got root on latest L 5.1.1 Z2D6503 with this method

Hii
I just got my Z2 rooted with this method
I just followed the steps
http://forum.xda-developers.com/xperia-z2/general/guide-how-to-root-xperia-z2-android-5-1-t3253878
Just one question
My bootloader sayz unlock not allowed...
Can I now flash TWRP or not?
Or is it just that I can not flash kernels??
I dont understand what is diffrent with bootloader locked and unlocked
Mine as I have read is locked forever so I dont want to brick my device or something...
Some advice about such bootloaders and what I can NOT DO would help me to understand
Thanks in advance
EDIT 01:
I just have followed the link in that post where I have rooted the phone
And just got TWRP installed as my recovery
So just to let you guys know evan dual recovery works fine with L5.1.1.
Just to say I have LockedBootloader
So guys please advice me for further
What restrictions do I have with the LB in diffrence to Unlocked BL
Can I do exact the same flashing of things like they on unlocked BL or not?
What should I be carefull about
Please guy give some info
1- With locked bootloader
you can only flash sony stock based roms (you can flash miui rom as there is a version with sony stock base).
you cannot flash cyanogenmod or custom kernels and any other rom.not based on stock sony.
2- with Unlocked bootloader
You can flash any custom rom or kernel for xperia z2 including cyanogenmod.
But you will LOOSE your DRM keys if you unlock your bootloader which will degrade the camera quality and xreality engine...
Pozdrav druže
You cant accidentally unlock your BL and if it says it cant be unlocked Im afraid it is locked forever. There is no any way to unlock it AFAIK. If you have root, which it looks like you do, you can install TWRP by downloading an app TWRP manager from the plat store, give it root permission and in Install section find your variant of Z2 and let it doo its thing. It will automatically flash recovery.img and reboot and thats it.
Now you can flash all [UB] as unlocked bootloader marked roms, but no custom kernels and AOSP ROMs.
In my experience, if you try to flash something for LB it will just produce an error and you can reboot your device normally without any changes.
Thanks guys !!!
No its all clear to me
working on D6503 5.1.1, tnx!
arnoudasmit said:
working on D6503 5.1.1, tnx!
Click to expand...
Click to collapse
Worked for me also but mine is also locked bootloader
It's work really good on my Xperia D6503 (23.4.A.1.264) with locked bootloader

[Help] Can I relock bootloader or Flash Stock Rom ?

I'm unlock bootloader with official unlock tool. Can I relock bootloader ? or flash Stock rom (WW_21.40.1220.2171) ?
ZE600KL,Z00L
Edit: Sorry my bad English.

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