Relock Bootloader and get back to official 7.1.1 Indian variant - Xperia Z5 Premium Q&A, Help & Troubleshooting

I have unlocked my bootloader on Sony Xperia z5 premium dual e6883 and flashed a custom rom....but now I want to get back to official state to 7.1.1 nougat.....and how to backup ta partition......please help me . My phone is in critical situation
Sent from my Xperia Z5P using Tapatalk

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[Q] Xperia ZL lag issue.

I've a Xperia ZL n my sister coincidently brought a Z as well, I compare my phone to her phone, my ZL is more laggy than hers...strange...both our phones got the same UI, firmware n tech specs...I'm wondering...
Both on Android 4.1.2
Both with nth installed(new)
Both running on 10.1.A.1.434
Both with MBE2 on
Both with xLoud on
Both with Clear Phase on
Both with Developer Options n USB Debugging on
Both with animations on 1x
Both hv password
Both with GPS n aGPS on
Both with a 32GB Class 10 MicroSDHC card installed
Both with SIM card installed n with data traffic on all time
Are there any way to optimize my ZL to be as smooth as Z without rooting?
Both without task killer
I noticed the ZL displayed on the Sony Center is smoother than my ZL. Weird. I never tried this but perhaps you can either do full wipe or install a clean ROM, try various region of ROM. One might be smoother than the other
Do I need to unlock the bootloader or being rooted to flash official ROM?
Sent from my Sony Xperia ZL C6502 L35h using XDA Premium HD app
tomfan203 said:
Do I need to unlock the bootloader or being rooted to flash official ROM?
Sent from my Sony Xperia ZL C6502 L35h using XDA Premium HD app
Click to expand...
Click to collapse
No you dont need to unlock the bootloader to flash stock rom. Just repair your phone by pc suit or flash stock firmware by flashtool.
Firmware : http://forum.xda-developers.com/showthread.php?t=2196718

Recovery for 4.2.2 unlocked (c6503)

Plz, where can i find recovery for 4.2.2?
Info: C6503 BL unlocked rooted
Sent from my C6503 using xda app-developers app
What purpose you chase when unlocking bootloader? If you want to try non original Sony, AOSP based ROM, then you can flash specific kernel with built in recovery. Other way there is no need to unlock BL, because you can modify stock Sony FTF what way you want.
Do you backup TA first (for back to locked BL)?
sent from Xperia ZL
I think the dual recovery by nut schoukd work:
http://forum.xda-developers.com/showthread.php?t=2288118
sturmtruppler said:
I think the dual recovery by nut schoukd work:
http://forum.xda-developers.com/showthread.php?t=2288118
Click to expand...
Click to collapse
It wont.
What roms are you looking to install? For the ZL the kernel is in the same image as recovery, so you need one for ether the one for Sony based roms or AOSP based roms.
At least for AOSP use the following.
http://forum.xda-developers.com/showthread.php?t=2225231
I'm on rooted 4.2.2 stock ROM and dual recovery by [NUT] works for me!
-> http://forum.xda-developers.com/showthread.php?t=2288118
Don't forget to save drm keys before you unlock your bootloader or Bravia Engine will stop working !!!
Use latest flashtool to save your keys.. http://androxyde.github.io/
__
btw.. does someone know if there's a way to split kernel partition on the ZL?
we could have one for the kernel and one for recovery..

[q] firmware help?

Hey guys. I bought an xperia m single sim (c1905) a week ago and rooted as soon as i got it. I wanted more so i tried to unlock the bootloader, but realised that my bl was not unlockable. I read on a few sites online that i can still flash 4.2.2 firmware on my phone. Is this possible with a locked bl? What are the risks involved? If so, is there a download.link for the latest 4.2.2 firmware?
1 more thing, is there any cwm recovery for locked bl?
Thank you guys for your help
Sent from my C1905 using xda app-developers app
paper13579 said:
Hey guys. I bought an xperia m single sim (c1905) a week ago and rooted as soon as i got it. I wanted more so i tried to unlock the bootloader, but realised that my bl was not unlockable. I read on a few sites online that i can still flash 4.2.2 firmware on my phone. Is this possible with a locked bl? What are the risks involved? If so, is there a download.link for the latest 4.2.2 firmware?
1 more thing, is there any cwm recovery for locked bl?
Thank you guys for your help
Sent from my C1905 using xda app-developers app
Click to expand...
Click to collapse
Yup you can flash the 4.2.2 firmware of Xperia M Dual.
It wont void your warranty as its stock xperia rom only.
You may re flash SS M firmware whenever needed.
No Hou cant have CWM in a locked Bootloader Device.
You can use flash gordan instead to flash zips.
Sent From My Sony M Dual C2004
Thank you so much for your quick reply, but do u have a link to the latest xperia m ds firmware available to be flashed on the xm ss. Again thank you
Sent from my C1905 using xda app-developers app
Here u go http://forum.xda-developers.com/showthread.php?t=2523368
Sent from my C2004 using XDA Premium 4 mobile app
Thank you guys soooo much. Right now im installing da firmware and will flash it as soon as i finish. Hope it works:what::thumbup::beer:
Sent from my C1905 using xda app-developers app
Yay it worked, talking to you from the new firmware as we speak
Sent from my C2005 using xda app-developers app
Congratulation.
Am sorry for not replying.
Didnt got a notification about ur reply.
Sent From My Sony M Dual C2004

[Q] Bootloader unlock allowed: NO

Hi there,
Is there a way to unlock this bootloader? Bootloader unlock allowed: NO
I've a C1905 with 4.1.2 (15.1.C.1.17), i've notification of update to 15.1.C.2.8...
thks
No there is no way of doing it, your one of many unlucky people with hard locked bootloaders. Plus that's the old 4.1 update and it's now on 4.3 so update to 15.1.c.2.8 then after that update to 4.3
Sent from my C1905 using XDA Premium 4 mobile app
Sad to say , you cant unlock your bootloader
Well your not really unlucky because Sony is keeping updates for our beloved Xperia M. Just be contented to it .
Thks u all for the quick response...
I'll have to stick with the SE ROM.... i loved costum roms in my old Nexus S...
Can i root the device with any version? or its better to do that before updating?
pmauzao said:
Thks u all for the quick response...
I'll have to stick with the SE ROM.... i loved costum roms in my old Nexus S...
Can i root the device with any version? or its better to do that before updating?
Click to expand...
Click to collapse
Yes you can root with any version .Just use towelroot .

[Q] [HELP]install custom rom

hello,I have a xperia m c 1905 in 15.4.A.1.9 with locked bootloader and wished install a custom?
it's possible?my bootloader is not unlockable and i don't bricked my device...what tuto for me?
thant for all
sorry for my bad english i'm french:cyclops:
No way
You can't.
Sent from my C1905 using XDA Free mobile app
mag62210 said:
hello,I have a xperia m c 1905 in 15.4.A.1.9 with locked bootloader and wished install a custom?
it's possible?my bootloader is not unlockable and i don't bricked my device...what tuto for me?
thant for all
sorry for my bad english i'm french:cyclops:
Click to expand...
Click to collapse
Well , it's almost impossible because Sony Devices don't have any recovery . So you have to unlock the bootloader and flash a custom recovery inorder to install Custom ROM :good:

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