[GUIDE] Back up DRM Keys & unlock/relock Bootloader (Noob proof)

[gpietron]

...i also made a version of D5503_14.3.A.0.757_EURO LTE.ftf that i like and use. however, i didn't upload it because i thought sony would release an update after just a few weeks like they did with 681 and 757...
if you are interested in that version let me know and i'll upload it.

thanks for the offer, yes I might try it to see if my corporate Contacts/Calendar sync issue would still exist. They are breaking on KK for some reason - probably not a fault of Z1C ROMs (the same was happening on HD2). Not immediately as all working very nice, but I might test it in free time during a weekend .

 

[najar360]

guys, need help here. i stuck at after format system. and forget to put all 3 item need to flash after format inside storage. and i accidently restart.
what to do now?

 

[zxz0O0]

guys, need help here. i stuck at after format system. and forget to put all 3 item need to flash after format inside storage. and i accidently restart.
what to do now?

Restart from the beginning.

 

[TQuest]

thanks for the offer, yes I might try it to see if my corporate Contacts/Calendar sync issue would still exist. They are breaking on KK for some reason - probably not a fault of Z1C ROMs (the same was happening on HD2). Not immediately as all working very nice, but I might test it in free time during a weekend .

Latest version of my Firmware
D5503_14.3.A.0.757_Euro ...79-6238.4)_no_System.ftf md5: 1f28d570bbcd21b0c2abdaf1690a4610
z1c-44-14.3.A.0.757-EURO_LTE.system.flashable.zip md5: df920cb3ec83082537dff94df942df46

 

[najar360]

Restart from the beginning.

it works! thanks for your advise

 

[shem2409]

Here is a video guide showing step by step how to complete the procedure:

 

[mihaid]

I have the phone rooted and also Philz touch 6.0.4? Could a backup done with philz be restored if I mess up the update to 757 firmware? Would it put my phone in exactly the same state as when the backup is made. Reading here I saw that some people had problems restoring?

 

[darkmystel]

I'm now totally screwed :/
Wasn't able to flash super su
Then I tried wipe which was showing data wiped but unable to do anything with mounts n I tried reset which also failed n rebooted now all I see is Sony n no led lights even

 

[isimsizkullan]

is flashing the stock rom (ftf) via flashtool enough for the unroot and stock recovery?

 

[zxz0O0]

I have the phone rooted and also Philz touch 6.0.4? Could a backup done with philz be restored if I mess up the update to 757 firmware? Would it put my phone in exactly the same state as when the backup is made. Reading here I saw that some people had problems restoring?

Generally, yes that's what the backup is meant for. But I made a backup on Philz and it gave me an error on restoring data partition so I advise you not to use Philz for backup.

I'm now totally screwed :/
Wasn't able to flash super su
Then I tried wipe which was showing data wiped but unable to do anything with mounts n I tried reset which also failed n rebooted now all I see is Sony n no led lights even

Restart from the guide.

is flashing the stock rom (ftf) via flashtool enough for the unroot and stock recovery?

Yes.

 

[mihaid]

Generally, yes that's what the backup is meant for. But I made a backup on Philz and it gave me an error on restoring data partition so I advise you not to use Philz for backup.
.

What should I use then?

 

[zxz0O0]

You can for example use TWRP recovery. If you're using dualrecovery, you can boot into TWRP by holding Volume Down (instead of Up).

 

[darkmystel]

Generally, yes that's what the backup is meant for. But I made a backup on Philz and it gave me an error on restoring data partition so I advise you not to use Philz for backup.


Restart from the guide.


Yes.

Yeah I was trying that only after a while only I found that the USB cable wasn't connected

Sent from my D5503 using XDA Free mobile app

 

[mihaid]

You can for example use TWRP recovery. If you're using dualrecovery, you can boot into TWRP by holding Volume Down (instead of Up).

followed the video guide and got a brand new 757 rooted firmware.
There was a contradiction between the video and the audio and the overlaid instructions
at 4:28 the C6903 file downloaded from the link from video did not have any entries whatsoever in Wipe window so I could not untick anything, flashed it anyway.
at 2:26 the caption says z1c 44 uk flashable but on the screen you can see z1c 44-14....757 uk flashablezip. being copied to the sd card. I had a copy of 757 from somewhere else so I flashed that not z1c44 uk.

 

[camaro322hp]

You can for example use TWRP recovery. If you're using dualrecovery, you can boot into TWRP by holding Volume Down (instead of Up).

Have you tried restoring from a TWRP backup?

Sent from my D5503

 

[kezown]

I successfully rooted, unlocked the bootloader and installed CM11 after following this excellent guide, but now have a hardware fault (microphone is broken) so I have to and back to Sony for repair. Coming from CM11 does anyone know what I have to do to relock the bootloader? As far as I know I need to reinstall A pure stock kernal and ROM but I don't know where to get them from for a UK Z1C. Please help

Sent from my Xperia Z1 Compact using Tapatalk

 

[zxz0O0]

Have you tried restoring from a TWRP backup?

Sent from my D5503

Yes, it worked perfectly. Somehow I lost my content on internal sd card (photos, videos), not sure if that's related though.

I successfully rooted, unlocked the bootloader and installed CM11 after following this excellent guide, but now have a hardware fault (microphone is broken) so I have to and back to Sony for repair. Coming from CM11 does anyone know what I have to do to relock the bootloader? As far as I know I need to reinstall A pure stock kernal and ROM but I don't know where to get them from for a UK Z1C. Please help

Sent from my Xperia Z1 Compact using Tapatalk

I advise you to upgrade to a rooted stock firmware following this guide: http://forum.xda-developers.com/showthread.php?t=2688933
It's best to take the same firmware as you made the TA backup (e.g. if you used 4.3 to take TA backup, flash 4.3 now). Then restore the TA backup with the program Backup TA to lock your bootloader.

 

[kezown]

Yes, it worked perfectly. Somehow I lost my content on internal sd card (photos, videos), not sure if that's related though.



I advise you to upgrade to a rooted stock firmware following this guide: http://forum.xda-developers.com/showthread.php?t=2688933
It's best to take the same firmware as you made the TA backup (e.g. if you used 4.3 to take TA backup, flash 4.3 now). Then restore the TA backup with the program Backup TA to lock your bootloader.

Thanks for helping me out with this but following that link just makes me even more confused (because it has links within links and I am a total noob when it comes to flashing phones). I went to this link because I have an unlocked bootloader with CM11 on it:
http://forum.xda-developers.com/showpost.php?p=51254652&postcount=3

I came from official UK 4.4 kitkat kernal so which ftf rooted stock firmware do I download and flash? And which Custom kernel with recovery do I install if I want to relock the bootloader?

Again, thanks in advance

 

[zxz0O0]

1. Download and flash http://forum.xda-developers.com/showthread.php?t=2722816 (check wipe everything)
2. Flash this kernel http://forum.xda-developers.com/showthread.php?t=2620794
3. Flash SuperSU in recovery
4. Boot phone and enable USB debugging + unknown sources
5. Open Backup TA on your computer and restore your TA backup.
6. Flash http://forum.xda-developers.com/showthread.php?t=2722816 again (check wipe everything)
7. Should be done, stock rom + bootloader locked (see 'Questions' how to check) + no root

 

[darkmystel]

I successfully rooted, unlocked the bootloader and installed CM11 after following this excellent guide, but now have a hardware fault (microphone is broken) so I have to and back to Sony for repair. Coming from CM11 does anyone know what I have to do to relock the bootloader? As far as I know I need to reinstall A pure stock kernal and ROM but I don't know where to get them from for a UK Z1C. Please help

Sent from my Xperia Z1 Compact using Tapatalk

I believe the firmwares list have an UK stock file which you can flash

Sent from my D5503 using XDA Free mobile app