yashsingh1/xdaforums huggingface dataset:
[Xperia Z1 General] tsiftsism:
Just to be sure, because as i mentioned before the phone is not mine (the Q&A may help other users too).

To downgrade to 4.2 i need the 14.1.G.1.534 downgrade FTF which can be found in post #2 of this thread we are reading-writing right now

Bin4rys root method can be found in this thread

DualRecovery can be found in post #2 of this thread

[NUT]s 4.4 prerooted rom is the C6903_14.3.A.0.681.flashable.zip can be found in this thread, but first do i need to download and flash either the 14.2.A.0.290 or 14.2.A.1.136 as mentioned in the requirements?
[Xperia Z1 General] gregbradley:
Yes, that's fine.

On the last point, I think you will be OK upgrading from 14.1.G.1.534, [NUT] may have put that requirement for being 14.2.A.0.290 as most people would already have been on it. You should be good to go from .154
[Xperia Z1 General] luis4ever:
Can i use this to downgrade from 4.4 on a C6906?
[Xperia Z1 General] maid:
finaly unlocked my bootloader but phone now says not rooted

which firmware to flash?

there is a new one out but i think i need a rooted one
[Xperia Z1 General] gregbradley:
Install doomkernel stock adbanced kernel, flash supers update (Linked in doomkernel thread),

then you are done.
[Xperia Z1 General] Metero:
unlock bootloader site is down

hey guys ... short question, why is the site "unlockbootloader.sonymobile.com" down? i cant access ... i checked the site, if its just for me down or for everybody and it says that its down for everybody. can somebody help?
[Xperia Z1 General] maid:
found the link and downloaded kernal

[ how to install my kernel ] (via recovery) [RECOMMENDED]

download the kernel package

save it to the sdcard

reboot into recovery HOW

flash the kernel package using recovery HOW

reboot from recovery into system

the device should now start booting

enjoy!

[ how to flash this kernel ] (via fastboot)

download the kernel image

save the boot.img to the folder containing fastboot binary WHERE

flash the boot.img using fastboot:

Can you help noob please
[Xperia Z1 General] maid:
Please help.

I could not update the phone log below.

Cant get into recovery mode either.

23/003/2014 10:03:42 - INFO - Device disconnected

23/003/2014 10:03:46 - ERROR - 1

23/003/2014 10:03:46 - INFO - Cannot open bundle. Flash operation canceled

23/003/2014 10:03:54 - INFO - Device connected with USB debugging off

23/003/2014 10:03:54 - INFO - For 2011 devices line, be sure you are not in MTP mode

Reflashed with C6903_14.2.A.1.136_Stripped ff

Updated by sony 14.3.A.0.681
[Xperia Z1 General] sneaky55121:
Hello,

Please help me to to root my Z1 V 14.3.A.0.681 without unlock the bootloader

Thank you
[Xperia Z1 General] maid:
Me too please
[Xperia Z1 General] mnsk:
I flashed NUT's C6903_14.1.G.1.534 on C6902 from kitkat, now i am getting bootloops as well as reboots. Cant root the device with reboots. Can someone tell what to do now? If I flash generic C6902 14.1.G.1.534 will i lose my IMEI and will i get it back after flashing NUT's pre rooted 4.4.2?
[Xperia Z1 General] sidx1:
u need to flash a generic c6902 ftf

the bootloop will stop

then root it and then update it to whatever version u want

it didnt work for me cause after downgrading..the rooting software wud keep telling me to turn in usb debugin even when i had..maybe ul have better luck
[Xperia Z1 General] mnsk:
So what version are you on? And how did you root it then?
[Xperia Z1 General] sidx1:
i havnt rooted it,im on .136 at the moment

il maybe try a different pc and see if it works in that
[Xperia Z1 General] liquidcooled:
boot loader lock command did not succeed

please help :(((
[Xperia Z1 General] groperfish:
Trying to root c6903. Really struggling with install of Flashtool on OSX (& Windows 8.1). Always get the error - "No Device to Import". Have drivers installed (under Windows) and have also tried adding the Device Files (both zip file and extracted folder) to the devices folder.

Would really appreciate any help.

Thanks kindly!
[Xperia Z1 General] gregbradley:
Not sure why you are trying to import a device

Please post the output of flashtool when you attach your phone with it turned on
[Xperia Z1 General] groperfish:
Just following instructions here: http://xdaforums.com/showthread.php?p=45464122

Under "Installation" it says : "- Open up flashtool, go to "devices => manage => import" and choose the device file you downloaded"

This is what flashtool says when I connect:

23/020/2014 15:20:11 - INFO - Device connected with USB debugging off

23/020/2014 15:20:11 - INFO - For 2011 devices line, be sure you are not in MTP mode

Thanks Greg. :)
[Xperia Z1 General] gregbradley:
make sure you have latest flashtool V0.9.15

Then once it is installed goto the installation folder and run drivers.exe

choose flashmode, fastboot and your device drivers

then you are good to go for flashing FTFs
[Xperia Z1 General] groperfish:
Thanks Greg. I have done this, just got distracted by the error caused by that line in the instructions.

Thanks again.
[Xperia Z1 General] sneaky55121:
Please, any idea?
[Xperia Z1 General] gregbradley:
downgrade to 4.2. Root using bin4rys method (Google it) install dual recovery for 4.2 (Found in development section) flash a 4.4 pre rooted rom
[Xperia Z1 General] sneaky55121:
Thank you very much

If I do this process, there is danger that my data be deleted?

With this process I lose my warranty?

after doing this, how could I unroot the phone?
[Xperia Z1 General] gregbradley:
Back it up

no

Flash a stock FTF
[Xperia Z1 General] JustPlayingHard:
You sure you won't lose warrenty
[Xperia Z1 General] gregbradley:
Yes, because when you unroot no one can tell that you ever rooted
[Xperia Z1 General] sneaky55121:
I want to be more specific with the question, doing this process the data is always deleted?

What process or program would you recommend me to backup all my apps including application data such as advances in games?
[Xperia Z1 General] gregbradley:
Flashing a stock FTF will wipe data if do not uncheck the wipe data box

Rooting on its own does not wipe data

Anyway, use sony backup and restore to backup all data and use google account as well, there is an option to sync data/settings to your google account and restore it later
[Xperia Z1 General] sneaky55121:
Please recommend me a process to downgrade to 4.2 from 4.4.2 Root using binary
[Xperia Z1 General] gregbradley:
To download FTFs

http://bit.ly/Q4rp3D

to flash FTFs

http://www.flashtool.net/download.php

Root method

http://bit.ly/Q4rhRq
[Xperia Z1 General] sneaky55121:
Hello,

Sorry for so many questions but do not want to make any mistake

I have already flashed this version C6903-1277 Global 14.2.A.1.136 2880_R1B (downgrade to 4.2), but my phone continuously restarts!!!!! help

Now what should I do if I want to have a 4.4.2 version rooted rooted?
[Xperia Z1 General] gregbradley:
which phone do you have?

Press and hold volume up and power until you feel it vibrate 3 times to stop the bootloop
[Xperia Z1 General] sneaky55121:
I have Xperia Z1 with kit C6903 with 14.3.A.0.681

Previusly I made a backup with this procedure

http://xperiafirmware.com/8-firmware/42-sony-xperia-z1-c6903

how to backup your original firmware customization

a) if you do not want to lose warranty of your phone , first thing You have to do is to backup your customization Original

b ) download Sony Update Service ( SUS) and reinstall firmware of your phone (backup your data first)

c ) That after , go to YOUR folder in Program Files folder and search for db / some Number / blob_fs , there you find 3 files , que FILE names start

d ) download and install latest Flashtool from here ( Google mirrors or Mega Drive )

e) paste the three files , que start FILE names , from folder to folder blob_fs "Firmware " included in the XPERIA Flashtool

f ) Open the Flashtool , click on Advanced, choose decrypt files and put all three files from folder to the right blob_fs columm

g ) click ok and after approx . one minute to pop up Window will Appear via Flashtool

h ) mark all files and transfer them to the right column , than fill in a box in the upper right corner (fill in what you want , it is just for you)

i ) now click ok and Flashtool will create backup of your original firmware customization, anytime That you can flash to your phone​

Help me please
[Xperia Z1 General] gregbradley:
flash an FTF that starts with 14.1....

the root it using bin4ry method

then install recovery etc, as I said before
[Xperia Z1 General] sneaky55121:
I really thank you!

Please recommend me a link to "dual recovery for..." and the link to download pre rooted rom 4.4
[Xperia Z1 General] gregbradley:
dual recovery

http://xdaforums.com/showthread.php?t=2261606

for pre rooted rom look in the development section....
[Xperia Z1 General] sneaky55121:
Again my phone continuously restard....

Please, what version shoould I download from http://nut.xperia-files.com/?
[Xperia Z1 General] gregbradley:
None yet,

flash a ftf from this thread

http://xdaforums.com/showthread.php?t=2469191

that starts with 14.1.... and is for your phone
[Xperia Z1 General] sneaky55121:
I already flashed this version: C6903 14.1.G.2.257 Global 1277-2880

but my phone restarts continuously....

I can't get my phone root witgh the provess of http://xdaforums.com/showthread.php?t=1886460..... any idea?
[Xperia Z1 General] gregbradley:
flash again and make sure you have all options enabled to wipe
[Xperia Z1 General] sneaky55121:
Ok while I complet this process, please tell me what version should I download from http://xdaforums.com/showthread.php?t=2261606 - http://nut.xperia-files.com/
[Xperia Z1 General] gregbradley:
which FTF are you flashin?
[Xperia Z1 General] sneaky55121:
This: 14.1.G.2.257 Global 1277-2880
[Xperia Z1 General] gregbradley:
Z1-lockeddualrecovery2.7.97-BETA.installer.zip (10.4MB)

this should work
[Xperia Z1 General] sneaky55121:
Hello

I was able to root and install dual recovery but just with the version C6903_14.1.G.1.534

I find a version of 4.4.2 rooted (http://xdaforums.com/showthread.php?t=2687443) but first I have to install 14.2.A.0.290 version (http://xdaforums.com/showthread.php?t=2572988), but i have a problem

After I flash the zip and the stripped file muy phone restarts continuosly, I have tried 3 times but always the same

Please help me
[Xperia Z1 General] gregbradley:
After flashing which one? For 14.2.A.0.290 or the 4.4.2 one?

You should be able to go straight to the 4.4.2 one from the 14.1.G.1.534
[Xperia Z1 General] infernape763:
Thanks :D
[Xperia Z1 General] sneaky55121:
Because one the Requirementsof tbe 4.4.2 are:

Current rooted FW version: 14.2.A.0.290 or 14.2.A.1.136 .

Or could you please recomend me another rooted that works please?
[Xperia Z1 General] 301stSpartan:
Shouldn't matter. The 136 inductions said you had to be on 290 rooted to get to 136 but in reality it worked perfectly fine to go straight from 534
[Xperia Z1 General] sneaky55121:
Ok, I will try, do you know another option to download the 4.4.2 prerooted?
[Xperia Z1 General] waterballoon:
i just bought the phone. it's on KitKat. i'm gonna downgrade to 4.2.2. but to flash recovery etc to upgrade to RomAur Kitkat I need UB. But on sony site it states i must be on 4.3 onwards to unlock bootloader or camera will not work

need to confirm if i can unlock bootloader on 4.2.2 then flash RomAur
[Xperia Z1 General] gregbradley:
You do not need to unlock the bootloader to root (unless you have a us t-mobile version)
[Xperia Z1 General] TeqTronix:
There's a new update available

And I was just about to root my phone... It has been like two years since I marked around with an android, I was an Apple user for a while (horrible, I know) so I'm a bit rusty on the topic. And my question is (can't find an answer) : If I was to root my phone using this guide, downgrade (I mainly need the root to install a few mods, don't need to unlock bootloader), will I be able to upgrade with the new official firmware tonight (PC Companion) WITHOUT losing the root and the mods?
[Xperia Z1 General] gregbradley:
No, official upgrade formats system so you will lose root.

But if toy downgrade and root you can install recovery and flash a pre rooted 4.4 rom to preserve root
[Xperia Z1 General] TeqTronix:
If you have a link for the pre-rooted 4.4 I'd be forever grateful
[Xperia Z1 General] 301stSpartan:
Here you go, just follow instructions on the thread (basically just flash the zip in recovery, power off, then flash the small ftf file in Flash Tool. http://xdaforums.com/showthread.php?t=2687443
[Xperia Z1 General] TeqTronix:
Will try now, hoping it'll go smooth
[Xperia Z1 General] 19manu91:
Need confirmation

Dears,

I bought my new Sony Xperia Z1 C6903 with 14.2.A.0.290 build and obviously 4.3 fw. In particular:

REGION Germany

BRANDING Customized DE

CUST. NO. 1277-0154

SI NUMBER 1276-2646

Please, can you confirm the following actions?

I would like to get the phone with latest build installation (14.2.A.1.136) with root permission. I'm actually not interested to install Custom ROM, so, from your tutorial i think that i don't need absolutely to unlock the bootloader, right?

In short, from what I understand, the steps to follow are:

1) Downgrade with Flashtool to 14.1.G.1.534

2) Apply root with Vroot or 360 root

3) Backup TA partition for try to recover phone in case of error

4) Flash with Flashtool a STOCK 14.2.A.1.136 or higher (if ther will be) with [ROOT & RECOVERY] Pre-installed (have you got a link to download this .ftf?) <--- I DON'T NEED TO UNLOCK THE BOOTLOADER FOR MAKE THIS PASSAGE, RIGHT?

I would like to be sure before doing something wrong..

Sorry for my English, i'm Italian :)..

I hope you can help me and I wish not to have gone off topic. Thank you all.
[Xperia Z1 General] 301stSpartan:
Some comments:

1) Yes

2) You can, but I would use Bin4ry's method, as Vroot and 360 steal your IMEI number

3) Yes

4) No... Instead you need to:

4a) flash a recovery from (here)

4b) flash the pre-rooted 136 (or if you want 4.4 ROM flash the 681) zip file in recovery. This is NOT done in Flash Tool, it is done through recovery.

4c) Turn off the phone (don't reboot) after you flash in recovery and then flash the smaller 136 or 681 stripped FTF file in Flash Tool (this file should be pretty small, about 21 MB)

Or.... for the 4th step just follow the instructions on Nut's pre-rooted ROM pages (like the one I linked above).
[Xperia Z1 General] 19manu91:
So.. When the zip file will be installed from TWRP recovery, i'll turned off the phone. Next i'll turn on the phone in Flashboot mode and i'll install the ftf with flashtool.

For knowledge.. What happened if i'll reboot the phone after the flash of zip from recovery? soft brick? will be recuperable?

and.. is not possible to got root access directly on build 14.2.A.0.290?

Thank you for your help.
[Xperia Z1 General] 301stSpartan:
Not sure what would happen. Might be soft brick, might just mess up the installation, might not make any difference at all.

But no, you can't directly root 290. Only 534
[Xperia Z1 General] timberwolf60:
Double post, deleted.

Send from my C6903 using TapatalkPro

my SG device: Z1 rooted 681 ROM by NUT with 2.7.100 xzdualrecovery, mod by GavityBox 3.0.0 b5. Samsung S2 standby for Z1 when Z1 no power.
[Xperia Z1 General] Blizz1982:
I have one question.

Someone try make root by downgrade only kernel to .534 After that root by binary. After rooting Flash newest kernel .681?

This trick working with my old xperia arc on android ICS (if I good remember)
[Xperia Z1 General] maid:
Flashtool

I am running 4.4

Can i use flashtool to downgrade root and flash new firmware???
[Xperia Z1 General] f_u_006:
You can downgrade/upgrade using flashtool but with no root!

Now if you want root on 4.4 then follow the procedure:

-Downgrade

-Root

-Install Recovery

-Flash the latest prerooted 4.4 using flashtool...
[Xperia Z1 General] gregbradley:
Use flashtool to downgrade to .534 FW,

Then install dualrecovery, flash SuperSU.zip, install a prerooted 4.4 rom from the development section in recovery.
[Xperia Z1 General] maid:
Can you link me to the files I will require and could you do a short method on how to do this.

I have tried reading but it seems to get sidetracked and I am getting so confused
[Xperia Z1 General] gregbradley:
http://bit.ly/1dMAfNC

I have written he method a dozen or more times in the last week.

use flashtool to downgrade to a .534 FTF (Find it in the mega collection thread)

Instal dual recovery (See the above search)

Flash SuperSU by chainfire (Google it)

Flash [MENTION=4904057][NUT][/MENTION]'s pre rooted 4.4 rom (See search above or in the development section)

That's it.

There are loads of "How to threads" in the general section and development section. I do not want to just copy and paste from there to here.
[Xperia Z1 General] maid:
What to use to root??
[Xperia Z1 General] gregbradley:
Where in my instructions did I say root?

When you install dualrecovery that roots your phone (But only on .534 FW), the next step of flashing SuperSU from chainfire finishes the rooting process
[Xperia Z1 General] timberwolf60:
When you are on 534 without root. Just need to install the latest dualrecovery with options 3. In the installation processes it will asked you to root. If you wanted to root the phone, just swab to the right in twrp and SuperSU was automatically installed. Then used twrp to do a backup. Then fellow op in this thread: http://xdaforums.com/showthread.php?t=2687443

and you will success and enjoy.

For Pre rooted rom we no need to root our phone, just flashed it and we will had a rooted rom.

Just to share with you on another method.

Send from my C6903 using TapatalkPro

my SG device: Z1 rooted 681 ROM by NUT with 2.7.101 xzdualrecovery, mod by GavityBox 3.0.0 debug5.

Samsung S2 standby for Z1 when Z1 no power.
[Xperia Z1 General] gregbradley:
That's what I said....Except you will SuperSU as it is not included in [MENTION=4904057][NUT][/MENTION]s prerooted rom and his instructions say you have to come from a current rooted rom..
[Xperia Z1 General] maid:
Flash [MENTION=4904057][NUT][/MENTION]'s pre rooted 4.4 rom (See search above or in the development section) there are two files here do I need both??
[Xperia Z1 General] gregbradley:
Do the instructions in [MENTION=4904057][NUT][/MENTION]'s thread say you need both? Yes they do....
[Xperia Z1 General] MrLascivious:
How to make the best backup before your first flash?

Hi Guys!

I've been reading the guide posted here about 4 times already. I'm still hesitant to proceed because the first step of backing up is not clear.

I am new to Android and I still have the stock 4.4 KitKat unrooted on my device.

The steps here indicate that I:

a. Downgrade to the posted 4.2 FTF using Flash tool

b. Do root

c. Upgrade as rooted.

Note I dont plan to unlock the bootloader yet. I want to downgrade my KitKat to 4.3 or 4.2.

The thing is, before I want to do all of that, I want a:

1. Full back up of my device.

2. Have a copy of the stock rom that I have.

The things is, there is no clear suggestion on how to do #1 and #2. If there are, the procedure requires rooted phone already! I want to save my current state as potential recovery as for my first attempt in flashing/rooting.

The stock app of Backup and Restore is disappointingly not a full-backup as I've experienced when I was upgrading from 4.3 to 4.4.2. I want a better backup that saves all my settings, my organization of the apps etc. I also question the validity of the 4.4.2 backup being restored on a 4.3.

Can someone guide me to the right tools or procedures to doing a reliable unrooted backup?
[Xperia Z1 General] gregbradley:
Once you have downgraded and installed dualrecovery, then just do a backup in recovery.

Backup apps using Sony backup and restore app, then you can always just use a FTF to restore your current firmware and restore your apps from the sony backup you made
[Xperia Z1 General] MrLascivious:
Hi gregbradley, thanks for the reply! I suspected this early but it is not desirable but work-able. I just fear I might brick my phone when doing the actual rooting process, and then I can only install dual recovery afterwards not before.
[Xperia Z1 General] gregbradley:
Of course, recovery needs root access.

But don't worry, you can always flash a FTF to get back to "Out of the box, factory settings" or force a repair via pccompanion.

Its is very difficult to brick a phone just by flashing recoveries and roms, you may go wrong and soft brick but that's easy to fix. As long as you don't mess with the bootloader its fine.

You can make a backup of your current FW by making an FTF, just google how to do that.
[Xperia Z1 General] Champdor:
Same problem here with Z Ultra on .681. No success to dig up anything on XDA. Can anybody help? Maybe reinstall drivers?

HELP please!

Champdor
[Xperia Z1 General] abheshekk:
Hi Guys,

I was on stock 4.4.2 ROM and to get root I have flashed .534 FTF using Flash tool now my imei number is gone, I have continued and installed superSu and dualrecovery....can you please tell me how to get my imei number back?

if I flash nuts 4.4 flashable file using recovery on .534 will i get my imei number back?

Thanks
[Xperia Z1 General] gregbradley:
Yes

Follow the instructions through to the end
[Xperia Z1 General] 301stSpartan:
Yes, just flash Nut's ROM and all will be good
[Xperia Z1 General] andyjrobinson:
I have had no luck either with this. I have given up now as nobody seems to know or understand the situation correctly.

Might have to wait for some stable way of doing this or installing a custom rom with locked boot loader.
[Xperia Z1 General] Rui Oliveira 21:
Hi Greg, I need your opinion on something Im about to try. Well currently I have CE KK on my Z1 but Id like to try the Customized PT version of the newst firmware, wich according to Xperia Update Checker is already available to PT, generic. Thus I was planing to:

1- Flash the previous 14.2.A.0.290_Generic Central Europe

2- Root the Z1 with Doomlord easy root kit

3-After rooting, edit the build.prop and change the custom numer

4-If viable when conecting to PCC it should appear the update notification,

Please tell me, is it viable???
[Xperia Z1 General] gregbradley:
Sounds good to me. But no need to root, just flash a previous version of FTF which has the update available...
[Xperia Z1 General] Rui Oliveira 21:
Thanks for the quick reply :fingers-crossed:

Thing is, I dont find the latest PT firmware anyware so i need to flash the .290 CE version, root it, change the custom number and then get the kitkat firmware PT via PCC

Lets hope it works ;)
[Xperia Z1 General] xsony.plus:
just rooted C6903_14.1.G.1.534_NUT.ftf and Debug on but couldn't backup TA(Backup-TA-9.10), said no TA partition could not be found!

any way to get OTA updates or reloocking BL?
[Xperia Z1 General] gregbradley:
Use flashtool to relock, and then use flashtool to unlock again.

If you have already unlocked the phone then you have deleted your TA permanently. You have to do the backup after rooting and before unlocking.
[Xperia Z1 General] andyjrobinson:
Have you been able to unlock then relock then unlock again?
[Xperia Z1 General] gregbradley:
I have unlocked but never bothered to relock.

But you can do it. You just have to make sure flashtool does it in flashmode not fastboot mode because then it will fail as it looks for the TA. You have to make sure the correct file structure is inplace. I will find the thread where it is explained

Read this

http://xdaforums.com/showthread.php?t=2703456
[Xperia Z1 General] SrMoure:
Is there any chance in the future to get a way to root the Z1 on KitKat without downgrading ?
[Xperia Z1 General] gregbradley:
Probably not, because it's too easy to downgrade. No one will work on it while they're is an easy way to do it like this. What's the problem with downgrading btw?