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Hey guys.
Two days ago i have flashed back my SK17i to stock rom.
I updated from FOTA.
I didn't know i must relock bootloader before updating from FOTA, so i bricked my phone.
After 2 minutes of deep panic, i've flashed the relock .ftf file, but it won't work on phones unlocked with test point.
So, i found a way to relock bootloader and go back to stock. (On forums i didn't see any guide regarding the method to relock bootloaders unlocked by test point)
I've done in this way:
1) Flashed stock kernel
2) Flash the .ftf relock file
3) With S1Tool hit restore
The phone is now bootloader locked, without losing of DRM!
Sent from my SK17i using XDA App
could you please give more info about that i was unlocked my st18i and than i flash stock firmware with wolan server and than i rooted my device but i do not know how i can relock it. I tried flashtool and relock.ftf but the program can't see loader.bin it just saw preset.ta and i afraid to do that please help me to relock my phone...
xSiRiNx said:
could you please give more info about that i was unlocked my st18i and than i flash stock firmware with wolan server and than i rooted my device but i do not know how i can relock it. I tried flashtool and relock.ftf but the program can't see loader.bin it just saw preset.ta and i afraid to do that please help me to relock my phone...
Click to expand...
Click to collapse
How did you unlocked? Point test or software method?
Sent from my SK17i using XDA App
unlocked with the key method at official website but the main problem is flashtool program couldn't show the loader.sin it only saw preset.ta ido not understand why?
xSiRiNx said:
unlocked with the key method at official website but the main problem is flashtool program couldn't show the loader.sin it only saw preset.ta ido not understand why?
Click to expand...
Click to collapse
Did you tried to download the latest version of flashtool?
Also, try to re-download the ftf file from another mirror, you should able to relock bootloader.
Sent from my SK17i using XDA App
does it means with the bootloader locked using this method, we could update fota after that?
paijho158 said:
does it means with the bootloader locked using this method, we could update fota after that?
Click to expand...
Click to collapse
Yes, if you use this method, you can use fota!
(I used it)
Sent from my SK17i using XDA App
cappyt said:
yes, if you use this method, you can use fota!
(i used it)
sent from my sk17i using xda app
Click to expand...
Click to collapse
dont use fota update for test point method..for some works for some dosent..for me it wont work..use pc companion to update..its safe..
CappyT said:
Hey guys.
Two days ago i have flashed back my SK17i to stock rom.
I updated from FOTA.
I didn't know i must relock bootloader before updating from FOTA, so i bricked my phone.
After 2 minutes of deep panic, i've flashed the relock .ftf file, but it won't work on phones unlocked with test point.
So, i found a way to relock bootloader and go back to stock. (On forums i didn't see any guide regarding the method to relock bootloaders unlocked by test point)
I've done in this way:
1) Flashed stock kernel
2) Flash the .ftf relock file
3) With S1Tool hit restore
The phone is now bootloader locked, without losing of DRM!
Sent from my SK17i using XDA App
Click to expand...
Click to collapse
brov dont really understand dis, please break it down a little bit!
I just registered to confirm this method works. I foolishly allowed a FOTA yesterday and bricked my phone. It was unlocked via testpoint so the relock method didn't work, even though I tried it! I also tried flashing with S1tool with generic firmware and that didn't work. Then just out of curiousity/desperation I clicked on the RESTORE button in S1 and my phone actually started but was now locked again. I re-did the testpoint unlock this morning so now my phones fully updates and working with my SIM of choice.
I don't know if you need to do all the flashing as it may just be the RESTORE that does the trick. I definitely won't be allowing any OTA from now on. Lesson learned!
Just to confirm, so long as I do the update via PCCompanion or SEUS software I wont need to do all this?
Files to download please?
snaky90 said:
Files to download please?
Click to expand...
Click to collapse
What files?
If you unlocked your bootloader with test point, no need to flash anything, just press restore button in s1tool.
anyone tried this method to relock the bootloader which unlocked by test point method and still have the sim/network unlock
CappyT said:
Hey guys.
Two days ago i have flashed back my SK17i to stock rom.
I updated from FOTA.
I didn't know i must relock bootloader before updating from FOTA, so i bricked my phone.
After 2 minutes of deep panic, i've flashed the relock .ftf file, but it won't work on phones unlocked with test point.
So, i found a way to relock bootloader and go back to stock. (On forums i didn't see any guide regarding the method to relock bootloaders unlocked by test point)
I've done in this way:
1) Flashed stock kernel
2) Flash the .ftf relock file
3) With S1Tool hit restore
The phone is now bootloader locked, without losing of DRM!
Sent from my SK17i using XDA App
Click to expand...
Click to collapse
hey, what is ur method to unlock ur BL via paid version or free?
if free , can you access the fastboot mode??
RELOCK BOOTLOADER INSTRUCTIONS
If you want to update through sony's service, we must relock BOOTLOADER for it, this article will guide you want to go back to the original
1./ Download C68XX: http://yadi.sk/d/uxZBDZ_SKyGrN
2./ Unzip copy the path "C: \ FlashTool \ devices"
3./ Open FlashTool.exe click BLU (turn off phone 30 seconds volum button and plug usb) finished it will show up for you including IMEI relocker table and bootloader unlocker key
4./ Click on the button a few seconds after the completion relocker
Now you can update directly through Sony's servcie. :good:
bad english, hope you understanding
This guide will help for many people !
anyone tested yet ?
Safar_Ibrahim said:
anyone tested yet ?
Click to expand...
Click to collapse
Work 100%, test ok
hoaianh2007 said:
Work 100%, test ok
Click to expand...
Click to collapse
Does restoring this mean it appears unrooted to Sony for warranty purposes ?
will this allow us to get X-reality back also?
p.s. the download link doesn't work
Zuber said:
Does restoring this mean it appears unrooted to Sony for warranty purposes ?
Click to expand...
Click to collapse
Doubt it. DRM keys were wiped out during initial unlock, as I understand it.
hoaianh2007 said:
RELOCK BOOTLOADER INSTRUCTIONS
If you want to update through sony's service, we must relock BOOTLOADER for it, this article will guide you want to go back to the original
1./ Download C68XX: http://yadi.sk/d/bNIpukky8MPY8
2./ Unzip copy the path "C: \ FlashTool \ devices"
3./ Open FlashTool.exe click BLU (turn off phone 30 seconds volum button and plug usb) finished it will show up for you including IMEI relocker table and bootloader unlocker key
4./ Click on the button a few seconds after the completion relocker
Now you can update directly through Sony's servcie. :good:
bad english, hope you understanding
Click to expand...
Click to collapse
Where did you get working drivers for FlashTool ? I installed the PC companion and it recognizes the C6802 no problem but in FlashTool it doesn't recognize nor have support for the Ultra ....
crippenx said:
Where did you get working drivers for FlashTool ? I installed the PC companion and it recognizes the C6802 no problem but in FlashTool it doesn't recognize nor have support for the Ultra ....
Click to expand...
Click to collapse
maybe you have done something wrong first step. trying....
Yesterday I re-locked the bootloader using this process, everything went fine, I have a locked bootloader now. Today I am trying to unlock it again following the Sony procedure. Everything goes fine and I get the OK confirmation in fastboot, after that the phone will enter in an endless reboot loop.
Am I doing something wrong?, is there a way to get out of the boot loop?, or I should follow different process to unlock the bootloader now?, thanks
brosenz said:
Yesterday I re-locked the bootloader using this process, everything went fine, I have a locked bootloader now. Today I am trying to unlock it again following the Sony procedure. Everything goes fine and I get the OK confirmation in fastboot, after that the phone will enter in an endless reboot loop.
Am I doing something wrong?, is there a way to get out of the boot loop?, or I should follow different process to unlock the bootloader now?, thanks
Click to expand...
Click to collapse
wish I could help ya, I can't even get flashtool to recognize the Xperia ZU -- which drivers did you use? I don't see the ZU listed as supported in the drivers section ...
as for your problem -- did you use the same key Sony email'ed you the first time or asked the website to generate a new one? As I understand it, the first unlock also deleted the DRM keys .. not sure if that was used somehow to calculate the KEY it generated (kinda like a hash check?) shrugs -- I know that Re-locking your bootloader did NOT restore those keys ... not unless you backed it all up first with that backup app that's on the dev section.
G'luck --
crippenx said:
wish I could help ya, I can't even get flashtool to recognize the Xperia ZU -- which drivers did you use? I don't see the ZU listed as supported in the drivers section ...
as for your problem -- did you use the same key Sony email'ed you the first time or asked the website to generate a new one? As I understand it, the first unlock also deleted the DRM keys .. not sure if that was used somehow to calculate the KEY it generated (kinda like a hash check?) shrugs -- I know that Re-locking your bootloader did NOT restore those keys ... not unless you backed it all up first with that backup app that's on the dev section.
G'luck --
Click to expand...
Click to collapse
Disable usb debugging and Flashtool will recognise ur device (pc compainian must be installed)
And u mean do TA restore before again unlocking boot loader? So unlock, lock and again unlock (with Sony method) will brick device?
Is there a way to unlock with Flashtool?
Sent from my C6802 using Tapatalk 4
newstar said:
Disable usb debugging and Flashtool will recognise ur device (pc compainian must be installed)
And u mean do TA restore before again unlocking boot loader? So unlock, lock and again unlock (with Sony method) will brick device?
Is there a way to unlock with Flashtool?
Sent from my C6802 using Tapatalk 4
Click to expand...
Click to collapse
Well I am a bit confused as to what you are asking and why ----
You mention a TA restore --- that would imply you did a TA BACKUP *before* unlocking bootloader --- correct?
If that is the case, why did you RE-lock the bootloader with the procedure in this thread .. you could/should have just done TA Restore. The procedure here is just for us saps who unlocked the BL via Sony method.
Now .. having said that ... I *believe* that you can still do a TA Restore (if you did a Backup obviously) -- and it should bring everything back to square 1 .. but since I never got to do it, I can't say I've tested this. Why not ask in that thread, the developer seems to have tested out a few diff scenarios successfully.
Cheers
Ahh you mean Ta restore will auto lock the boot loader.. that is what I understand..
Exactly I have Ta backup before unlock boot loader
Regards
P.s and then I can again unlook boot loader from Sony method using that first email keys...
Right?
Sent from my C6802 using Tapatalk 4
newstar said:
Ahh you mean Ta restore will auto lock the boot loader.. that is what I understand..
Exactly I have Ta backup before unlock boot loader
Regards
P.s and then I can again unlook boot loader from Sony method using that first email keys...
Right?
Sent from my C6802 using Tapatalk 4
Click to expand...
Click to collapse
Yes, exactly. If you have a TA Backup before unlock, you're good
And yes you should be able to unlock again with original keys.
One thing -- why would you even WANT to unlock the BL? rooting the phone has been achieved now without unlocking the bootloader -- there's no advantage to unlocking it now.
cheers!
Custom recoveries are great fun
Sent from my iPhone using Tapatalk
newstar said:
Custom recoveries are great fun
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
Are there any custom ROMs or recoveries available yet?
......and.....iphone.... seriously
vinokirk said:
Are there any custom ROMs or recoveries available yet?
......and.....iphone.... seriously
Click to expand...
Click to collapse
Haha....
For c6802 custom recoveries may be come soon
Sent from my C6802 using Tapatalk 4
newstar said:
Haha....
For c6802 custom recoveries may be come soon
Sent from my C6802 using Tapatalk 4
Click to expand...
Click to collapse
I do believe there's one available now.
corrado85 said:
will this allow us to get X-reality back also?
p.s. the download link doesn't work
Click to expand...
Click to collapse
DRM keys lost, only way is to have done a TA backup before unlock. If you didn't you loosed it, only can hope devs find a way to get it back without the DRM keys.
vinokirk said:
I do believe there's one available now.
Click to expand...
Click to collapse
Available but not working yet, having trouble with the new .IMG for new s800 will take some time.
Sent from my Nexus 7 using xda app-developers app
I read in the Developers forums that you can get Cwm for Locked Bootloaders. Ive been trying to get it for a week and can this be done? I bought the Ultra at Bell and it says its model number c6806 and its locked.
dvella21 said:
I read in the Developers forums that you can get Cwm for Locked Bootloaders. Ive been trying to get it for a week and can this be done? I bought the Ultra at Bell and it says its model number c6806 and its locked.
Click to expand...
Click to collapse
Yes. here it is:
http://forum.xda-developers.com/showthread.php?t=2426739
However just because you have CWM, doesn't mean you can flash ROM's.
All you can do is flash Root, and other mods.
hamdogg said:
Yes. here it is:
http://forum.xda-developers.com/showthread.php?t=2426739
However just because you have CWM, doesn't mean you can flash ROM's.
All you can do is flash Root, and other mods.
Click to expand...
Click to collapse
sorry for the quick question, but would that work on the C6802 on .257, with locked bootloader? i've been wondering if i could get root without unlocking the bootloader(to preserve warranty).
yogi2010 said:
sorry for the quick question, but would that work on the C6802 on .257, with locked bootloader? i've been wondering if i could get root without unlocking the bootloader(to preserve warranty).
Click to expand...
Click to collapse
yes you can root with a locked bootloader.
to unlock your bootloader you need to have root access.
You can always backup your TA partition, and then unlock bootloader, and then restore the TA partition and restore bootlock as well.
many possibilitites
hamdogg said:
yes you can root with a locked bootloader.
to unlock your bootloader you need to have root access.
You can always backup your TA partition, and then unlock bootloader, and then restore the TA partition and restore bootlock as well.
many possibilitites
Click to expand...
Click to collapse
hey thank you sir for the response. I got my phone with .257 version already on it tho, and from what I'm reading, I can't find a way to root on .257 without unlocking the boot loader. is this correct?
as I see it, the only option I have on .257 is to unlock the bootloader with the Sony method, but no way to root first. am I mistaken? thanks!
lmemma16 said:
hey thank you sir for the response. I got my phone with .257 version already on it tho, and from what I'm reading, I can't find a way to root on .257 without unlocking the boot loader. is this correct?
as I see it, the only option I have on .257 is to unlock the bootloader with the Sony method, but no way to root first. am I mistaken? thanks!
Click to expand...
Click to collapse
What you could do is use flash tool to go back to another firmware, then root, and then update to the newest version. But not flashing the kernel. then you can flash the modified kernel with CWM, and then flash the new kernel afterwards.
I think there is a tutorial on here that tells you how to do it.
hamdogg said:
What you could do is use flash tool to go back to another firmware, then root, and then update to the newest version. But not flashing the kernel. then you can flash the modified kernel with CWM, and then flash the new kernel afterwards.
I think there is a tutorial on here that tells you how to do it.
Click to expand...
Click to collapse
ah yes, OK, that's what I was wondering, whether it is possible to downgrade the firmware with a locked boot loader, using Flashtool. perhaps I will try.. thanks
I just remember on some other devices I've had, a locked boot loader wouldn't allow a firmware downgrade.
Well, it seems to me that Bell will never update the phone to KitKat, given that I never even got the update after .290, so I guess I have to take this to my own hands.
First off, is it safe to use flashtool on a locked bootloader? Sadly, Bell also screwed us out of an unlockable bootloader.
Secondly, will any ftf file that's for the 6833/6806 work?
And thirdly, what should I exclude via flashtool? My phone is currently on .290 with no root, a locked bootloader, and no way to unlock bootloader.
If anyone can provide any help, or even instructions to the procedure I should take, it would be greatly appreciated. Thank you!
Just flash the 6833 ftf and see what happens (all should be good.though) if anything goes wrong just flash a proper ftf for the bell version.
Sent from my C6833 using xda app-developers app
I never backed up my TA partition, is that something that I must do, or can I exclude TA from flashtool and have it work that way? I'm also unrooted, so I can't quite just back it up.
Eliasj said:
I never backed up my TA partition, is that something that I must do, or can I exclude TA from flashtool and have it work that way? I'm also unrooted, so I can't quite just back it up.
Click to expand...
Click to collapse
You only need to backup ta partition if youre unlocking the bootloader.
You shouldn't have any problems flashing a non bell ftf.
Sent from my C6833 using XDA Premium 4 mobile app
I flash ftf 6833 and my zu is 6802 . I nohave problem.:cyclops: my bootloder is lock!
+++++++++++++++++++++++++++++++++++++++
you must use The latest version FLASHTOOLS for flash ftf 6833 on 6802 Otherwise you cant flash !
youre fine flashing any c6833 .ftf i used the HK one, i just excluded baseband (since im not familiar with this stuff and i didnt want to mess with something that connects me to rogers lol ) TA is fine for us since our bootloader is locked from bell, i dont think well ever need to back it up.
When i originally unlocked the bootloader I had backed up my TA partition.
Now I have a question, can I restore my drm keys from it since im on another version of lollipop?
Sent from my D6503 using XDA Free mobile app
Drm keys are Android version independent. So the answer is yes, you can restore them.
However it's good to remember some rules before restoring; it will also relock your bootloader so, if you have unauthorized software inside your phone by Sony, like a recovery or a custom ROM, your phone will NOT boot as they are normally designed to work with unlocked bootloader.
You should do a backup before proceed or make sure you are on a nin-custom Sony firmware.
Sent from my D6503 using XDA Free mobile app
_delice_doluca_ said:
Drm keys are Android version independent. So the answer is yes, you can restore them.
However it's good to remember some rules before restoring; it will also relock your bootloader so, if you have unauthorized software inside your phone by Sony, like a recovery or a custom ROM, your phone will NOT boot as they are normally designed to work with unlocked bootloader.
You should do a backup before proceed or make sure you are on a nin-custom Sony firmware.
Sent from my D6503 using XDA Free mobile app
Click to expand...
Click to collapse
Excuse me I ment im on another version of Android*, From your answer I understood I cant restore that.. So what are my options for restoring them?
Sent from my D6503 using XDA Free mobile app
As I understand, the DRM keys are not reliant on your Android version. So keys from 4.4.4 should work on 5.0.2 as they shouldn't change. I'm pretty sure envious_data has confirmed this (please correct me if I'm wrong).
HOWEVER, restoring them will relock the bootloader. If you are on a non-sony custom ROM (so CM, AOSP, etc) the phone will not boot (eXistenZ, Moonwalker (I think), and other stock based ROM's will however).
Stock based ROM's will ONLY boot if you have a stock kernel (which is found inside of the ftf file), any custom kernel (advanced stock, AndroPlus, any CM/AOSP, any other stock based kernel) kernels will not.
A locked bootloader recovery will not prevent the phone from booting, as it is on the /system partition and not inside of a kernel.
Also, if you have a recovery installed to the FOTAKernel partition, restore that to stock as that will prevent the phone from booting. The stock FOTAKernel file can be found in the ftf file too. If needed I can strip an ftf file down to stock kernel and FOTAKernel to be flashed.
CosTuMe said:
Excuse me I ment im on another version of Android*, From your answer I understood I cant restore that.. So what are my options for restoring them?
Sent from my D6503 using XDA Free mobile app
Click to expand...
Click to collapse
You can restore your DRM keys on any android version but you must make sure you'r completely on a stock build. (No custom kernals)
Deleted.
whats the procedure for restoring them?
CosTuMe said:
whats the procedure for restoring them?
Click to expand...
Click to collapse
If you used the BackupTA tool (or whatever it is called, it's in the cross device section) use the restore function in that.
But before you do, make sure you are on a stock based ROM, with a full stock kernel and full stock FOTAKernel partition.
gamer649 said:
If you used the BackupTA tool (or whatever it is called, it's in the cross device section) use the restore function in that.
But before you do, make sure you are on a stock based ROM, with a full stock kernel and full stock FOTAKernel partition.
Click to expand...
Click to collapse
Ok, i had done it(and the phone boots). is there anyway to check i got them back?
CosTuMe said:
Ok, i had done it(and the phone boots). is there anyway to check i got them back?
Click to expand...
Click to collapse
Open the phone dialer, *#*#7378423#*#*, Service Tests, Security, and then look to each row. Each one will be followed by [KEY OK][ACTIVE].
Also, to check the bootloader is relocked.
Open the phone dialer, *#*#7378423#*#*, Service Info, Configuration, look to rooting status. It will say "Bootloader unlock allowed: Yes", instead of "Bootloader unlocked: Yes".
Thank you very much, I had succeeded restoring them
Sent from my D6503 using XDA Free mobile app
im currently on kitkat rom with full root and unlocked bootloader, and im planning to lock the bootloader. if i upgrade my phone to the latest official lolipop rom. can my phone lock the bootloader? can i get a new DRM key?
PS: i unlocked BL without backing the DRM keys so i lost it.
ulyshut said:
im currently on kitkat rom with full root and unlocked bootloader, and im planning to lock the bootloader. if i upgrade my phone to the latest official lolipop rom. can my phone lock the bootloader? can i get a new DRM key?
PS: i unlocked BL without backing the DRM keys so i lost it.
Click to expand...
Click to collapse
You can re-lock the bootloader without the DRM keys, however it will not restore them. You can use the bootloader unlock/re-lock function in flashtool to lock the bootloader again.
You can lock the bootloader on any android version, regardless of what version you unlocked it on. But if you didn't back up your DRM keys there is no way to get them back, they are lost forever unfortunately.
thanks for the reply, because my remote play access did not work when i rooted my phone . now based on the other thread, its about the DRM key and unlock BL that is causing the issue.
Steps to restore DRM keys?
Hey,
I want to just request some help about the DRM keys. I know more or less what to do since I have lost them in order to get root. As I have understood the steps go:
Backup all apps and whatnot
Flash stock ftf file from any version (wipe APPSLOG, CACHE, DATA) via Flashtool
Root using Easy Root Tool
Backup TA partition using this tool
Push dual recovery into phone using NUTs Dual Recovery script
Restore TA partition using the tool above
And hopefully I would have Root with working keys? I am currently getting the 17.1.2.A.0.314 & 17.1.1.A.0.402 ftf firmware. If I am missing anything from the steps above please inform me.
Thanks ^^
.
suenoromis said:
Hey,
I want to just request some help about the DRM keys. I know more or less what to do since I have lost them in order to get root. As I have understood the steps go:
Backup all apps and whatnot
Flash stock ftf file from any version (wipe APPSLOG, CACHE, DATA) via Flashtool
Root using Easy Root Tool
Backup TA partition using this tool
Push dual recovery into phone using NUTs Dual Recovery script
Restore TA partition using the tool above
And hopefully I would have Root with working keys? I am currently getting the 17.1.2.A.0.314 & 17.1.1.A.0.402 ftf firmware. If I am missing anything from the steps above please inform me.
Thanks ^^
Click to expand...
Click to collapse
If you unlocked your BL before making backup of TA your keys are lost FOREVER .
Even if you downgrade and start everything again you won't get the keys back as they were unique to your device. If you don't have a TA backup of your keys don't waste time downgrading...
But if you DO HAVE A WORKING TA backup with YOUR keys then downgrade to 4.4.2, root, restore your TA (BL will get locked in the process), install dual recovery and upgrade to a pre-rooted firmware. You'll still have your keys and BL locked.
Steps to restore DRM keys?
ptmaniac said:
If you unlocked your BL before making backup of TA ..... You'll still have your keys and BL locked.
Click to expand...
Click to collapse
So there's absolutely no way to get the keys back after unlocking the bootloader?
What about this?
_delice_doluca_ said:
Drm keys are Android version independent. So the answer is yes, you can restore them.
However it's good to remember some rules before restoring; it will also relock your bootloader so, if you have unauthorized software inside your phone by Sony, like a recovery or a custom ROM, your phone will NOT boot as they are normally designed to work with unlocked bootloader.
You should do a backup before proceed or make sure you are on a nin-custom Sony firmware.
Click to expand...
Click to collapse
suenoromis said:
So there's absolutely no way to get the keys back after unlocking the bootloader?
What about this?
Click to expand...
Click to collapse
Confused about what? you are overcomplicating things.
You can get your keys back ONLY if you have a backup of your TA BEFORE unlocking your bootloader.
DID YOU BACKUP YOUR TA BEFORE UNLOCKING YOUR BOOTLOADER?
If you answer YES --> you can restore your keys
If you answer NO --> they are lost forever.
SImple.
suenoromis said:
So there's absolutely no way to get the keys back after unlocking the bootloader?
What about this?
Click to expand...
Click to collapse
Sorry, If I got things complicated. Let me explain it in scenerios and steps;
Small İnfo first; there is a small partition (or a small and untouchable part inside of a partition) in our phones. It contains and "device-specific" keys, basically an ID.
Some Sony-made softwares (like a picture or sound enhancer which are activated when user starts a music or takes a picture) are patent protected and search for these keys before run. If keys are not there user still can take a picture or listen to music however the patented enhancing software will not kick in. So how do you lose the keys? Why is Sony making this?
Because they want to protect their patented technology from being exposed to inspections or non-Sony users. So basically they tell you if you "unlock your bootloader" you will be able to do anything with your phone freely but the keys-including-partition will be wiped forever and those patented software addings will not run.
Let's get to scenerios.
1th Scenerio: You want to install custom kernel, recovery or ROM to your device? You have to unlock bootloader and it is simple. But doing this basically will wipe your keys and they will be gone forever.
2nd Scenerio: The device can be rooted without unlocking its recovery (very clever Sony, you think about protecting your patent and invent the "keys partition" and lock them to bootloader and get rooted that easily). Once we obtain root, we can read and write to any partition, including the one with the keys (it is called Trim Area). Once we are rooted, with FlashTool, we can backup the TA partition and protect the keys on our PCs.
"After the backing up", once we unlock the bootloader the phone will wipe TA partition but we will have a backup of them on our PCs.
With that backup on our PCs, we can safely do whatever we want; install custom ROMS, kernels, recoveries etc. (actually, there is even a recovery installation possible with "locked bootloader" ) and once we need to claim our warranty or want Sony-patented software enhancements, we can simply restore the TA partition (again with FlashTool).