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Help reverting to stock ROM

Hi there,
I recently unlocked the bootloader on my Xperia Z so i could root my phone. I want to revert back to the stock firmware originally on the phone and tried downloading what i believed to be the stock firmware and flashed the device but everytime i try to install the newly released 4.2.2 firmware, it keeps telling me that it fails as the phone has modified firmware. I have tried using the sony update service but i get the same error and really have no clue on how to rectify this. Please help as im worried ive completely messed up the phone.
TIA

Use EMMA Flashtool. Read everything and you are ready to go.
Don't use PC Companion or Sony Update Software on an unlocked device.

Thanks for the info.
I followed the instructions in the help file but everytime i run the software, my system crashes out and i cant seem to run it

Blue screen? Could be drivers issue.
You could download a stock FTF and flash it with Flashtool too. Same effect as EMMA.

It's a case of actually finding a stock ftf
Sent from my C6603 using xda app-developers app

Is it worth me 're-locking the bootloader as I know this can be done with the flashtool
Sent from my C6603 using xda app-developers app

Bootloop after Root attempt

Hello,
I got a Japanese XperiaZ (Docomo) on which I tried to achieve root access following this guide:
http://www.xperiaguide.com/2013/07/...irmware-by-doomlord-easy-rooting-toolkit-v18/
After flashing the first .ftf and trying to turn on the phone I'm stuck in a bootloop (until Sony then restarts).
Now i wanted to reflash the original software but my computer says it can't recognize the device.
Can anyone please help me?

Natschlaus said:
Hello,
I got a Japanese XperiaZ (Docomo) on which I tried to achieve root access following this guide:
http://www.xperiaguide.com/2013/07/...irmware-by-doomlord-easy-rooting-toolkit-v18/
After flashing the first .ftf and trying to turn on the phone I'm stuck in a bootloop (until Sony then restarts).
Now i wanted to reflash the original software but my computer says it can't recognize the device.
Can anyone please help me?
Click to expand...
Click to collapse
If ur computer cannot recognize ur device try to reinstall device drivers or update
and if a software cannot recognize it try another software to repair ur phone
What tool r u using for flashing stock rom !??!

Before you dud that, were you on .244 fw version? If you weren't, that's the problem (because you said that you got Japanese XZ, and probably came with DoCoMo custom ROM). You have to flash stock non-DoCoMo .244 ftf first.
Sent from my C6602 using xda app-developers app

I'm using flashtool.
First I were on Docomo .343 and then I flashed XperiaZ_C660X_KernelOnly_10.3.A.0.423_Generic_NL.f tf.
After that I had the bootloop.
Turns out the usb cable was broken. Omg. Got another one and now I can connect in flash mode.
I was able to reflash the original 343 docomo Kernel and at least its starting again. Was a little bit scared there since it's not my phone.
How can I flash the stock firmware now? Could you please point me to the right direction. I tried to find the right guide for so long already.

Wow that's not right. It is very important for you to flash stock .244 ftf first.
This is what you have to do:
1. Get a new cable
2. Flash stock non-DoCoMo .244 ftf FULL ROM using flashtool. You can get download link around in development section.
3. You can start rooting using doomlord's guide.
Hope this helps.
Sent from my C6602 using xda app-developers app

Download DoCoMo firmware and use this guide
http://forum.xda-developers.com/showthread.php?t=2240614.
Sent from my C6603 using xda premium

Kept the 434 and rooted it. Thanks for your help!!

Unable to update .244 from OTA for my Xperia Z

Hi,
I am not able to update my XZ to the latest .244 firmware. Here are some info of my Phone.
1) locked bootloader (it is unlockable)
2) current on .423 firmware.
3) rooted
4) install superSU (with survival mode on)
5) install OTA rootkeeper.
I saw some post stating that they are able to keep root after OTA, so i am hoping to keep my root too after OTA.
please advise.

I have exactly the same problem. Cant do OTA and im states scared to update through PC companion since my friend bricked up the phone.
Sent from my C6603 using Tapatalk 2

Are you running stock .423 odexed? I had this issue when I flashed a deodexed ROM then tried OTA update
Sent from my C6603

Hi,
It is not possible to do a OTA Update after deleting one or more system apps (even stuff like partnerbookmarks).
There are, however, 2 ways to get the Update.
1.) Follow some of the instructions here like this: http://forum.xda-developers.com/showthread.php?t=2287149
There are some other ways posted here at xda. They use the flashtool to flash current firmware.
2.) Use Sony PC Companion, this will work ALWAYS,but: Root will be gone. U can use Doomlords rooting method to get Root again:
http://forum.xda-developers.com/showthread.php?t=2386405
Good luck

hutilicious said:
Hi,
It is not possible to do a OTA Update after deleting one or more system apps (even stuff like partnerbookmarks).
There are, however, 2 ways to get the Update.
1.) Follow some of the instructions here like this: http://forum.xda-developers.com/showthread.php?t=2287149
There are some other ways posted here at xda. They use the flashtool to flash current firmware.
2.) Use Sony PC Companion, this will work ALWAYS,but: Root will be gone. U can use Doomlords rooting method to get Root again:
http://forum.xda-developers.com/showthread.php?t=2386405
Good luck
Click to expand...
Click to collapse
I flashed mine .423 using flashtool, so guests I needed update using pc then...
Sent from my C6603 using xda premium

Flashben said:
I flashed mine .423 using flashtool, so guests I needed update using pc then...
Sent from my C6603 using xda premium
Click to expand...
Click to collapse
PC Update will never fail, the only thing is that you lose root access, which can be easily recovered though.

hutilicious said:
PC Update will never fail, the only thing is that you lose root access, which can be easily recovered though.
Click to expand...
Click to collapse
Yeah, just updated and rooted
Sent from my C6603 using xda premium

PLEASE HELP
my xperia Z , c6602 , got new update .244
tried to update using fone , downloded 175 mb and restrted, updating proceess came up (android logo) automatically rebooted when the progress bar about 75% , not updated same old .423
tried 2 times same issue,
then i tried using sony pc companin(win8), donloaded updated and strted update process, progress bar 90% came up error that update failed,
disconnect phone,
NOW phone didnt boot up
only SONY logo coming and switchs off.
pls help

It could be brick....
Sent from my C6603 using xda premium

Flashben said:
It could be brick....
Sent from my C6603 using xda premium
Click to expand...
Click to collapse
thanks for responce, so what i can do now?

diz_007 said:
thanks for responce, so what i can do now?
Click to expand...
Click to collapse
Hi mate, dont panic. Just follow the instructions on how to flash a stock firmware with flashtool. This is already described here at xda, try searching for it. It will repair your phone but data may be lost.
Look at this: http://forum.xda-developers.com/showthread.php?t=2240614
Sent from my C6603 using xda app-developers app

hutilicious said:
Hi mate, dont panic. Just follow the instructions on how to flash a stock firmware with flashtool. This is already described here at xda, try searching for it. It will repair your phone but data may be lost.
Look at this: http://forum.xda-developers.com/showthread.php?t=2240614
Sent from my C6603 using xda app-developers app
Click to expand...
Click to collapse
thanks.. i tryed repaIR OPTION FROM pc companin, data lost! but updated to latest and good now!

C6606 (T-Mobile USA) pre-Rooting questions

Hi All,
I have T-Mobile branded C6606 and have been considering rooting so that I can flash a c6603 stock ROM. I know the bootloader is locked on the device but here is my question:
If I flash a stock ROM and basically make the phone act as a 6603, will I get updates directly from Sony for example will I be able to upgrade to 4.3 or 4.4 via PC Companion or OTA ? I'm assuming this is with the bootloader remaining locked.
Also, assuming I decide to root and flash using a stock ROM are there any CONS...ie. Wifi or NFC issues ?
Thanks!

goon3r said:
Hi All,
I have T-Mobile branded C6606 and have been considering rooting so that I can flash a c6603 stock ROM. I know the bootloader is locked on the device but here is my question:
If I flash a stock ROM and basically make the phone act as a 6603, will I get updates directly from Sony for example will I be able to upgrade to 4.3 or 4.4 via PC Companion or OTA ? I'm assuming this is with the bootloader remaining locked.
Also, assuming I decide to root and flash using a stock ROM are there any CONS...ie. Wifi or NFC issues ?
Thanks!
Click to expand...
Click to collapse
No issues. It will perform as a 6603. Only thing you will loose is wifi calling... I'm typing this from a 6606 right now on rooted 4.3 ES firmware.
You need to flash a (.67) or (.74) rom first, root it, install recovery, and then you can install a (.569) pre-rooted rom. Make sure you set your apn correctly for mms functioning.
You can use this as your final update for now:
http://forum.xda-developers.com/showthredad.php?t=2583333
Please post questions in q&a section next time.
Sent from my C6603 using XDA Premium 4 mobile app

Thanks for the info Grogg.
I'm curious though, why is it that I should install the older (.67 or 74) ROM first ? I was actually planning to root, install CWM then simply find a Generic unbranded ROM to flash.
GROGG88 said:
No issues. It will perform as a 6603. Only thing you will loose is wifi calling... I'm typing this from a 6606 right now on rooted 4.3 ES firmware.
You need to flash a (.67) or (.74) rom first, root it, install recovery, and then you can install a (.569) pre-rooted rom. Make sure you set your apn correctly for mms functioning.
You can use this as your final update for now:
http://forum.xda-developers.com/showthredad.php?t=2583333
Please post questions in q&a section next time.
Sent from my C6603 using XDA Premium 4 mobile app
Click to expand...
Click to collapse

goon3r said:
Thanks for the info Grogg.
I'm curious though, why is it that I should install the older (.67 or 74) ROM first ? I was actually planning to root, install CWM then simply find a Generic unbranded ROM to flash.
Click to expand...
Click to collapse
Because you cannot root the 4.3 roms directly without an unlocked bootloader. The way I described is the only option for now.
Sent from my C6603 using XDA Premium 4 mobile app

Im on existenzv5 locked bl rooted c6606 tmobile running great

So I flashed a stock 6603 ES ROM (10.31.A.2.67), been testing it and no issues so far. Happy to get rid of some of the T-Mobile bloatware.
Since 4.3 is already out for the C6603 , I was expecting an OTA or PC Companion to prompt me to update to 4.3 (shows 6603). Am I missing something here ?
I haven't rooted or done anything else apart from the ROM Flash. To be honest I don't have much desire for Custom ROMs or need Root access, just a desire to get faster updates and less bloat. If I can get a stock 4.3 on the device I may leave it like that. The most important thing for me though is to just be able to get updates.
Wondering if I should start a new thread in the QA forum or if a MOD can simply move this one.

goon3r said:
So I flashed a stock 6603 ES ROM (10.31.A.2.67), been testing it and no issues so far. Happy to get rid of some of the T-Mobile bloatware.
Since 4.3 is already out for the C6603 , I was expecting an OTA or PC Companion to prompt me to update to 4.3 (shows 6603). Am I missing something here ?
I haven't rooted or done anything else apart from the ROM Flash. To be honest I don't have much desire for Custom ROMs or need Root access, just a desire to get faster updates and less bloat. If I can get a stock 4.3 on the device I may leave it like that. The most important thing for me though is to just be able to get updates.
Wondering if I should start a new thread in the QA forum or if a MOD can simply move this one.
Click to expand...
Click to collapse
There may or may not be an update available depending on the customization number you flashed. Either way, if you flashed a stock ftf then you will receive updates as they become available for your customization number.
Sent from my C6603 using XDA Premium 4 mobile app

Ok. Ignorance on my part. I was under the impression that the builds were generic enough that all would be eligible for updates.
The FTF I used was from this page:
http://forum.xda-developers.com/showpost.php?p=45856753&postcount=1
Can you point me at or recommend an FTF then ? I'm going to be giving the phone to a family member in a few weeks and just want them to at least be able to get regular updates.
GROGG88 said:
There may or may not be an update available depending on the customization number you flashed. Either way, if you flashed a stock ftf then you will receive updates as they become available for your customization number.
Sent from my C6603 using XDA Premium 4 mobile app
Click to expand...
Click to collapse

Generic ES 4.3 has been released. You should be getting an update to (.569). You can check firmware versions here:
http://forum.xda-developers.com/showthread.php?p=42234656
There is an ftf available for that update though, so you could go that route.
Download here:
http://forum.xda-developers.com/showthread.php?p=48974188
Sent from my C6603 using XDA Premium 4 mobile app

While I wait for the 4.3 ROM in that link (taking 3+ hours so far), I decided to try a generic UK Rom.
http://forum.xda-developers.com/showthread.php?t=2404211
I got prompted for an OTA update which completed fine, no prompt for 4.3 since though. Is it just a case of waiting or am I missing something ? When I use flashtool I am leaving everything at default only excluding baseband.
GROGG88 said:
Generic ES 4.3 has been released. You should be getting an update to (.569). You can check firmware versions here:
http://forum.xda-developers.com/showthread.php?p=42234656
There is an ftf available for that update though, so you could go that route.
Download here:
http://forum.xda-developers.com/showthread.php?p=48974188
Sent from my C6603 using XDA Premium 4 mobile app
Click to expand...
Click to collapse

goon3r said:
While I wait for the 4.3 ROM in that link (taking 3+ hours so far), I decided to try a generic UK Rom.
http://forum.xda-developers.com/showthread.php?t=2404211
I got prompted for an OTA update which completed fine, no prompt for 4.3 since though. Is it just a case of waiting or am I missing something ? When I use flashtool I am leaving everything at default only excluding baseband.
Click to expand...
Click to collapse
You can try rebooting and checking again. Did you ever perform a factory reset? If not, do it.
Also, the baseband really doesn't need to be excluded. I've seen no benefits in keeping any of the t-mobile garbage.
Sent from my C6603 using XDA Premium 4 mobile app

Refer to this thread http://forum.xda-developers.com/showthread.php?t=2311211
There will be some folder you may have to delete from PCC data because it is cached and PCC will still see your device with the old customization. It is explained in that 1st post.

GROGG88 said:
You can try rebooting and checking again. Did you ever perform a factory reset? If not, do it.
Also, the baseband really doesn't need to be excluded. I've seen no benefits in keeping any of the t-mobile garbage.
Sent from my C6603 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
I took your advice and reflashed with baseband and also did the factory reset. The baseband left me with weak LTE in areas where I normally have full bars. In the end the update still didn't show allowing me to move to 4.3. I ended up just flashing the 4.3 ES rom that you linked to and have been liking it so far.
I really would like to have a better understanding of how/why I wasn't getting the update prompts.
SmallsXD said:
Refer to this thread http://forum.xda-developers.com/showthread.php?t=2311211
There will be some folder you may have to delete from PCC data because it is cached and PCC will still see your device with the old customization. It is explained in that 1st post.
Click to expand...
Click to collapse
I actually looked into this, but at one point after flashing but didn't have any folder to delete. Also, after the last flash I connected to a brand new laptop that had never had PCC installed or seen the phone before and the result was the same. No update could be found.
I appreciate the suggestions so far, I'd love to know what else I can try though as I'd like to have the phone get regular updates independent of T-Mobile.

GROGG88 said:
Generic ES 4.3 has been released. You should be getting an update to (.569). You can check firmware versions here:
http://forum.xda-developers.com/showthread.php?p=42234656
There is an ftf available for that update though, so you could go that route.
Download here:
http://forum.xda-developers.com/showthread.php?p=48974188
Sent from my C6603 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Here are the steps I am taking to root my tmobile c6606 on a c6603 4.3 rom. It has been unsuccesful. I would like help.
I have used flashtool-0.9.13.0-windows tool.
I use it to successfully install Xperia Z (C6603)_10.4.B.0.569_Generic ES tft.
It is fully fuctional and works with no problems.
However.
I have tried the Root_with_Restore_by_Bin4ry_v33 tool that roots the C6606 succesfully when I have the original factory rom installed.
BUT when I have this 4.3 Generic ES rom installed it will not root. It says I need to enable USB Debugging. I do that. The the phone shows it is in that mode, but the root program will not see it in that mode.
Therefore, rooting can not occur..
What do I do?
Id like to root so I can install my special apps and remove bloat.
Thanks

nickcaper said:
Here are the steps I am taking to root my tmobile c6606 on a c6603 4.3 rom. It has been unsuccesful. I would like help.
I have used flashtool-0.9.13.0-windows tool.
I use it to successfully install Xperia Z (C6603)_10.4.B.0.569_Generic ES tft.
It is fully fuctional and works with no problems.
However.
I have tried the Root_with_Restore_by_Bin4ry_v33 tool that roots the C6606 succesfully when I have the original factory rom installed.
BUT when I have this 4.3 Generic ES rom installed it will not root. It says I need to enable USB Debugging. I do that. The the phone shows it is in that mode, but the root program will not see it in that mode.
Therefore, rooting can not occur..
What do I do?
Id like to root so I can install my special apps and remove bloat.
Thanks
Click to expand...
Click to collapse
You cannot root any 4.3 rom directly without unlocking the bootloader. As you have a C6606, you cannot do that.
You will have to downgrade to a 4.2.2 rom, root, then flash a prerooted 4.3 rom.
This information is readily available all over this section, so a search probably would have got you the information you needed.
Forum rules.
Sent from my C6603 using Tapatalk

[Q] Semi-Bricked Please Help

Hello everyone, I've been trying to get my Xperia Z rooted. The firmware is 10.31.E.0.191.
I did something wrong now I'm bricked. When I turn my phone on the Sony logo appears and then that's it, and the screen turns off afterwards. I've tried all methods and failed to get my device rooted.. I tried flashing the kernel of this ftf file "C6606_10.1.1.B.0.166_TMobile_US" thinking maybe I had to downgrade because my firmware wasn't supported with flashtool and other methods to root.
Please give me some advice!!

Flash a stock FTF to your phone to unbrick it, then root it with this - Root many Android. Method 0 is what you need to root your current firmware version.
Sent from my C6603 using Tapatalk

Already have that file downloaded. I used method 3. I guess I choose the wrong one then. I'll try using method 0 then! Also one thing, could you please link me to a stock FTF?

I don't have one to hand, sorry. There's definitely a C6606 stock rom in the general section. A search should find it.
Sent from my C6603 using Tapatalk

Ok I'll keep searching. I was going to download one and make it a FTF with flashtool but Sony PC Companion cant recognize my phone because of the issue lol no problem though, I'll get it! :good:
EDIT: Ok, so Sony PC Companion is fixing my phone atm, had no idea I could do that I just selected my device and it's fixing my device! After that I'll try method 0! Thanks man!

You're welcome.
Sent from my C6603 using Tapatalk