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ZTE Grand SII LTE (S291) - ROOT , RECOVERY, install GApps

Hi, folks
I want show you a tutorial how to easy do ROOT and install RECOVERY and then gapps , with a simple tool.
The tool is in Chinese, but you need only to click few times.
Let’s start:
1. Plug your phone to your PC and on the phone choose the option Install driver:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
2. Then install the drivers to your PC.
3. Now on your phone go to setting/ developer options and choose the option USB debugging on.
4.Download the ROOT TOOL from here: http://d-h.st/8Ma
5.Unpack it and run it with administrator rights.
6.Make sure your phone is connected and you have at least 20% battery, Click on the first option on the right site.
you will see this massage don’t click on anything
7. Now wait , your phone will restart and you should see the SUper user app in your apps.
In the tool click on OK
8.Lets continue with the RECOVERY installation. Click on the second option:
9. The same massages will appear ,do the same like on the earlier steps , just wait...
10. Your phone should now boot into recovery , click on the first option - this will reboot your phone
11. If you want google apps continue. Download gapps from here: http://goo.im/gapps/gapps-jb-20130813-signed.zip
12. Put the zip into the root of internal memory.
13. Turn your phone off and enter the recovery by holding volume up + power button until the phone vibrates , then release the power button.
14. You are in recovery now , go to the second option , than choose the first option , select your file , than choose the first option, this will install the google apps.
15. Now leave the recovery.
16. ALL done
I wish you luck
all credist go to myzte.cn
EDIT: REUPLOADED SCREENSHOTS

good,thanks
Sent from my ZTE Grand S II LTE using XDA Free mobile app

5KKKKK said:
good,thanks
Sent from my ZTE Grand S II LTE using XDA Free mobile app
Click to expand...
Click to collapse
You are welcome
BTW , when the next update is out version B07/B08 (i hope it is the big 4.4 update) , i will modify the ROM- with deleting the chinese apps , replacing chinese email , gallery, camera apps to original google one. So mostly stock

I like this phone,but the main problem is it has few ROMs,it seems that zte is not very popular
Sent from my ZTE Grand S II LTE using XDA Free mobile app

Danger ahead
Hello everybody,
I wanted to warn you, I followed this guide and after doing the root procedure my phone is bricked DEAD.
Won't turn on, won't do anything, not even charghing when power plug is connected, I just killed my phone after about 30 minutes of ownership. :/
PLEASE WAIT A LITTLE BIT BEFORE DOING THIS.
My phone is a grey ZTE Grand S II (NBA Edition, from what I see on the box...).
Does anybody here have an idea HOW I could get this back from the dead? :angel:
*** UPDATE ***
I was able to make it work!! Sorry for sounding so alarmed before... I was in panic mode.
If this doesn't work at first please try it on another PC, or switch USB port, and make yourself a big favor by using this:
http://visualgdb.com/UsbDriverTool/
to install your Android ADB driver.
The ZTE Grand S II (S291) is a GREAT handset and I hope the devs get interested because it's one of the BEST prcie/value ratio around...
Got it for 280 € on Aliexpress...
Thank You.
S.

Simmessa said:
Hello everybody,
I wanted to warn you, I followed this guide and after doing the root procedure my phone is bricked DEAD.
Won't turn on, won't do anything, not even charghing when power plug is connected, I just killed my phone after about 30 minutes of ownership. :/
PLEASE WAIT A LITTLE BIT BEFORE DOING THIS.
My phone is a grey ZTE Grand S II (NBA Edition, from what I see on the box...).
Does anybody here have an idea HOW I could get this back from the dead? :angel:
Thank You.
S.
Click to expand...
Click to collapse
Oh , that's not good , but no one bricked the phone to time...
But please look at the titile, have you the ZTE GRAND SII (s251) or the ZTE GRAND SII LTE (s291) because they're completely different phones.

Difference?
Hello Jozco,
I don't know, but I finally managed to get it back from the dead, by removing the battery and re-connecting it to the power plug, I can now turn it on again...
In About phone under model number it says ZTE S291.
I found something strange, when I issue a "adb reboot bootloader" command the phone goes off and dead, I have to detach the battery to be able to turn it on again... any ideas?
The phone has a NBA logo on the box, a gray cover, and I got it here:
http://www.aliexpress.com/snapshot/6097854185.html
Do you have any clues, I'm going crazy...
THANKS!
S.
jozco313 said:
Oh , that's not good , but no one bricked the phone to time...
But please look at the titile, have you the ZTE GRAND SII (s251) or the ZTE GRAND SII LTE (s291) because they're completely different phones.
Click to expand...
Click to collapse

Simmessa said:
Hello Jozco,
I don't know, but I finally managed to get it back from the dead, by removing the battery and re-connecting it to the power plug, I can now turn it on again...
In About phone under model number it says ZTE S291.
I found something strange, when I issue a "adb reboot bootloader" command the phone goes off and dead, I have to detach the battery to be able to turn it on again... any ideas?
The phone has a NBA logo on the box, a gray cover, and I got it here:
http://www.aliexpress.com/snapshot/6097854185.html
Do you have any clues, I'm going crazy...
THANKS!
S.
Click to expand...
Click to collapse
Oh so , that’s seems to be only a ADB driver problem, had it also , because i had a lot of phones to flash , my drivers were mixed up...
just download this: http://visualgdb.com/UsbDriverTool/
install it , open it , plug your phone to the pc , you will see ZTE Handset ADB Interface click on it and under Android ADB driver click install , this will install the universal ADB driver it should work.
I hope we get your phone rooted

I did the steps you suggested but that didn't change anything
The driver situation is ok, as you can see from the screenshot, yet, it WON'T reboot in the bootloader.
Whenever I issue a "adb reboot bootloader" it simply dies... and I have to remove battery.
Obviously I can't make fastboot work this way, therefore I can't move further, any tips?
Thank You!
S.
---
jozco313 said:
Oh so , that’s seems to be only a ADB driver problem, had it also , because i had a lot of phones to flash , my drivers were mixed up...
just download this: http://visualgdb.com/UsbDriverTool/
install it , open it , plug your phone to the pc , you will see ZTE Handset ADB Interface click on it and under Android ADB driver click install , this will install the universal ADB driver it should work.
I hope we get your phone rooted
Click to expand...
Click to collapse

Simmessa said:
I did the steps you suggested but that didn't change anything
The driver situation is ok, as you can see from the screenshot, yet, it WON'T reboot in the bootloader.
Whenever I issue a "adb reboot bootloader" it simply dies... and I have to remove battery.
Obviously I can't make fastboot work this way, therefore I can't move further, any tips?
Thank You!
S.
---
Click to expand...
Click to collapse
I mean this:
BTW did you checked USB debbuging , when you have connected your phone in the connection type have you checked Connect to PC software
?

jozco313 said:
I mean this:
BTW did you checked USB debbuging , when you have connected your phone in the connection type have you checked Connect to PC software
?
Click to expand...
Click to collapse
Yes, that's what I did! Then the software asked me to replace adb_usb.ini and perform adb kill-server, which I did...
C:\Windows\system32>adb kill-server
C:\Windows\system32>adb devices
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
List of devices attached
d70ec4e0 device
I can confirm USB debugging is enabled and my connection mode is "Connect to PC software".
I checked and re-did everything twice and still, adb reboot bootloader makes my phone die: screen black, no lights and won't even turn on unless I remove the battery...
If I'm doing something wrong, I really don't know what it is
Ideas?
S.

Simmessa said:
Yes, that's what I did! Then the software asked me to replace adb_usb.ini and perform adb kill-server, which I did...
C:\Windows\system32>adb kill-server
C:\Windows\system32>adb devices
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
List of devices attached
d70ec4e0 device
I can confirm USB debugging is enabled and my connection mode is "Connect to PC software".
I checked and re-did everything twice and still, adb reboot bootloader makes my phone die: screen black, no lights and won't even turn on unless I remove the battery...
If I'm doing something wrong, I really don't know what it is
Ideas?
S.
Click to expand...
Click to collapse
I really don´t know :/ , when you can try it on another PC...

jozco313 said:
I really don´t know :/ , when you can try it on another PC...
Click to expand...
Click to collapse
Later today I'll do another attempt with another PC I have at home, but I tend to believe this is related to the ZTE device itself, it's actually very strange that the bootloader is not responding, could it be faulty or simply that the bootloader has been wiped in some way?
I know it doesn't make a lot of sense since the phone itself is booting into ZTE Android just fine... but I'm left wondering, if things continue this way I'm gonna return it and ask my money back...
I'll let you know as soon as I can do some more testing, Thanks a lot for now!
S.

no way...
Simmessa said:
Later today I'll do another attempt with another PC I have at home, but I tend to believe this is related to the ZTE device itself, it's actually very strange that the bootloader is not responding, could it be faulty or simply that the bootloader has been wiped in some way?
I know it doesn't make a lot of sense since the phone itself is booting into ZTE Android just fine... but I'm left wondering, if things continue this way I'm gonna return it and ask my money back...
I'll let you know as soon as I can do some more testing, Thanks a lot for now!
S.
Click to expand...
Click to collapse
I tried again, from another PC with windows 7 32bit but same story again... after reboot it's dead and I must do the battery trick.
Here's my plan:
On my phone there's OS v B04 (please see screenshot)
So I'm planning to install v B06 which I got from ZTE support website...
What do you think? I'm hoping this will fix my broken bootloader!
Thanks!
S.

Simmessa said:
I tried again, from another PC with windows 7 32bit but same story again... after reboot it's dead and I must do the battery trick.
Here's my plan:
On my phone there's OS v B04 (please see screenshot)
So I'm planning to install v B06 which I got from ZTE support website...
What do you think? I'm hoping this will fix my broken bootloader!
Thanks!
S.
Click to expand...
Click to collapse
This is the exact file (ROM) I plan to flash on my device, should I do it?
(please see attach).
Thanks!
S.

Simmessa said:
This is the exact file (ROM) I plan to flash on my device, should I do it?
(please see attach).
Thanks!
S.
Click to expand...
Click to collapse
LATEST update:
I don't know why but I re-did the whole procedure with the second PC and WITHOUT explanation this time it worked like a charme... SORRY for wasting your time, but I'm not even sure WHY this time it worked... the only thing I did was switching a couple of usb ports and using the driver supplied by USBdrivertool (The link can found above in this thread)
So, if you have problems with this procedure PLEASE KEEP THE FAITH and you'll eventually do it!
THANK YOU everybody and especially jozco313 for the help and assistance!
S.

Simmessa said:
LATEST update:
I don't know why but I re-did the whole procedure with the second PC and WITHOUT explanation this time it worked like a charme... SORRY for wasting your time, but I'm not even sure WHY this time it worked... the only thing I did was switching a couple of usb ports and using the driver supplied by USBdrivertool (The link can found above in this thread)
So, if you have problems with this procedure PLEASE KEEP THE FAITH and you'll eventually do it!
THANK YOU everybody and especially jozco313 for the help and assistance!
S.
Click to expand...
Click to collapse
You are welcome I help when i can.
But i told you it can’t be the bootloader , because without it would be the device totally broken , you wouldn’t be able to turn on your phone.
BTW you can Update/Edit your first post in this thread , you know some people maybe get scared of buying this phone , and remember when the number of users will raise the development will be also better.

jozco313 said:
You are welcome I help when i can.
But i told you it can’t be the bootloader , because without it would be the device totally broken , you wouldn’t be able to turn on your phone.
BTW you can Update/Edit your first post in this thread , you know some people maybe get scared of buying this phone , and remember when the number of users will raise the development will be also better.
Click to expand...
Click to collapse
Hi Jozco,
sure you're right, I edited my post 'cause all is doing good now, this phone blows my mind!
The only issue I'm having is that Google Sync isn't updating my contacts... so I had to migrate them manually from my old phone, is it like that for you?
Thanks!
S.

Simmessa said:
Hi Jozco,
sure you're right, I edited my post 'cause all is doing good now, this phone blows my mind!
The only issue I'm having is that Google Sync isn't updating my contacts... so I had to migrate them manually from my old phone, is it like that for you?
Thanks!
S.
Click to expand...
Click to collapse
I really don´t know but i think yes i had duplicite contacts , because i updated from .vcf file from my old phone.
BTW you are right the phone is just great

ROOT
Hi, can help me anyone? I can´t provide root because the file for rooting seems to be damaged. I download ok, but unpacking is not possible. It appears note about corrupt or damaged file. Is it possible to download from different link? Thanks for help and answer
It´s ok now. Root was success

[Q] Downgrade to 4.2.2 Xperia L stock bootloader unlocked

Hi guys.
I need your help very urgently.
Update my phone to android 4.4.4 and I only realized until that moment that CM11 has no radio support on many devices.
I wanted to install the stock firmware but unfortunately 15.3.A.1.14 open my bootloader after I failed to make the connect via FlashBoot.
That is, if I try to connect to fastboot I have no problems doing that and that's that mean flashing kernels, but if I connect the phone to flash mode the LED does not light,
Although flashtools if recognized as a device connected in this way, if I try to flash the firmware via everything starts normally but before end I throw an error.
Anyone have an idea that I can do, and be able to tell me why this is happening?
I appreciate your help, and I hope you can understand my English is lousy.

Stronger1101 said:
Hi guys.
I need your help very urgently.
Update my phone to android 4.4.4 and I only realized until that moment that CM11 has no radio support on many devices.
I wanted to install the stock firmware but unfortunately 15.3.A.1.14 open my bootloader after I failed to make the connect via FlashBoot.
That is, if I try to connect to fastboot I have no problems doing that and that's that mean flashing kernels, but if I connect the phone to flash mode the LED does not light,
Although flashtools if recognized as a device connected in this way, if I try to flash the firmware via everything starts normally but before end I throw an error.
Anyone have an idea that I can do, and be able to tell me why this is happening?
I appreciate your help, and I hope you can understand my English is lousy.
Click to expand...
Click to collapse
Post the screenshot of the error!

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"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
[/url][/IMG]
david pro said:
Post the screenshot of the error!
Click to expand...
Click to collapse
Thank repsonder, this is the error.
However I must clarify what I have all drivers installed and up before upgrading the phone was detected in flash mode.

Stronger1101 said:
[/url][/IMG]
Thank repsonder, this is the error.
However I must clarify what I have all drivers installed and up before upgrading the phone was detected in flash mode.
Click to expand...
Click to collapse
Try again!!! One day, It happened with me too!!!
Try Changing the Cable or USB port!
:highfive:

david pro said:
Try again!!! One day, It happened with me too!!!
:highfive:
Click to expand...
Click to collapse
Try changing ftf. If still not resolved, try changing flashtool.
Best of luck
Hit thanks if it helps.

still connect flash mode
abhi007.john said:
Try changing ftf. If still not resolved, try changing flashtool.
Best of luck
Hit thanks if it helps.
Click to expand...
Click to collapse
Unfortunately the failure seems to be on the phone and tried it on another pc and the problem persists.
When I connect it with the volume down button, the LED lights green and then red for less than half a second, the pc makes the sound of announcing that something was connected but the phone does not turn on but the led.
The problem is that I have several tested tft and the result is the same, even though flashtool flash mode recognizes something is not right and I assume that's why flash it throws error.
I had the idea to flash in fastboot mode tft but I'm afraid to leave me a hardbrick,:crying:

Stronger1101 said:
Unfortunately the failure seems to be on the phone and tried it on another pc and the problem persists.
When I connect it with the volume down button, the LED lights green and then red for less than half a second, the pc makes the sound of announcing that something was connected but the phone does not turn on but the led.
The problem is that I have several tested tft and the result is the same, even though flashtool flash mode recognizes something is not right and I assume that's why flash it throws error.
I had the idea to flash in fastboot mode tft but I'm afraid to leave me a hardbrick,:crying:
Click to expand...
Click to collapse
I don't think that the red led keeps glowing when you connect on flash mode. It just flashes green and red once.
Also did you an updated flashtool on the other pc?
if not then try once with another cable। and flashtool.

abhi007.john said:
I don't think that the red led keeps glowing when you connect on flash mode. It just flashes green and red once.
Also did you an updated flashtool on the other pc?
if not then try once with another cable। and flashtool.
Click to expand...
Click to collapse
so it is, and try in another pc and another cable but I can not make connect, I have desperate

Stronger1101 said:
so it is, and try in another pc and another cable but I can not make connect, I have desperate
Click to expand...
Click to collapse
One more thing, the companion I recognized only when the computer is turned on but if I turn it off and connect in flash mode does not detect it.

Stronger1101 said:
One more thing, the companion I recognized only when the computer is turned on but if I turn it off and connect in flash mode does not detect it.
Click to expand...
Click to collapse
If I try to flash the firmware via fastboot damage my phone?

Stronger1101 said:
If I try to flash the firmware via fastboot damage my phone?
Click to expand...
Click to collapse
First of all, your english is terrible mate.
As far as I know you can't use fastboot to flash a firmware. I believe it's only for flashing kernels.
Also, make sure you have the required drivers installed. You can download latest drivers from here
http://forum.xda-developers.com/showthread.php?t=2635830
Along with that make sure you use an updated flashtool.
Head over to the general threadand you will find it
Hope it helps
Hit thanks if it does.

hei man, same **** hapens to me, try to use a old version of flashtool, 0.9.11.0 works for me

[Q] Brick problem, maybe?

Hi. I got some problems with my Xperia L C2104 today. Few days ago, it just display Entel logo and get freeze from there. After that, I try to restore it with Sony PC Companion, but it throws an error in "Updating Screen" (I choosed repair cel/table, etc etc), something about internet connection or something else. Then, I read a lot about flashing, fastboot, flashboot and everything on this forum, and I try many solutions exposed here and none works for me . My situation is the following; I can enter in fastboot, the blue light turns on and my PC recognize it, but some solutions, like use command window, throws me an error like "FAILED: Commando not allowed". This message appairs when I try:
fastboot flash recovery recovery.img
fastboot flash boot boot.img
etc
Includes, fastboot reboot, for instance.
My PC doesnt recognize my phone in "flash boot", the green lights turn on but nothing happens .
Can I do something else? I wanna discard some reasons about this problem, but I need some help.
This is my first post, and my english isn't so good., sorry.
Please help me !

FeeLitoo said:
Hi. I got some problems with my Xperia L C2104 today. Few days ago, it just display Entel logo and get freeze from there. After that, I try to restore it with Sony PC Companion, but it throws an error in "Updating Screen" (I choosed repair cel/table, etc etc), something about internet connection or something else. Then, I read a lot about flashing, fastboot, flashboot and everything on this forum, and I try many solutions exposed here and none works for me . My situation is the following; I can enter in fastboot, the blue light turns on and my PC recognize it, but some solutions, like use command window, throws me an error like "FAILED: Commando not allowed". This message appairs when I try:
fastboot flash recovery recovery.img
fastboot flash boot boot.img
etc
Includes, fastboot reboot, for instance.
My PC doesnt recognize my phone in "flash boot", the green lights turn on but nothing happens .
Can I do something else? I wanna discard some reasons about this problem, but I need some help.
This is my first post, and my english isn't so good., sorry.
Please help me !
Click to expand...
Click to collapse
Entel logo? N u say u read a lot but u dint understand anythng..first of al whats ur problem
Wic rom are u on? N ur pc doesnt recognize cs u havent installd drivers..u shud have read abt dis..just flasha ftf...
N no ur phone is not bricked !

Rohan purohit said:
Entel logo? N u say u read a lot but u dint understand anythng..first of al whats ur problem
Wic rom are u on? N ur pc doesnt recognize cs u havent installd drivers..u shud have read abt dis..just flasha ftf...
N no ur phone is not bricked !
Click to expand...
Click to collapse
Entel logo is my operator, like Vodafone, for example. Few days ago, my phone get that logo, after "Sony" screen and then get freeze. I want to wake up my phone, I cant access it. About the ROM, it was using the stock rom. I dont think that is a driver problem, before all of this, Sony PC Companion could recognize my phone when I was trying to "repair" with it. But actually, Flash Tool doesn't recognize my phone in flash boot, but it does in fastboot. Well, I tried to flash a kernel with Flash Tool in fast boot mode, but I received the same message (FAILED: Command not allowed), reading and reading I imagine that my phone doesn't allow to unlock the bootloader. In addition, I try to unlock it officially (Sony's tutorial using IMEI, etc) but I received the same message (FAILED: Command not allowed). I read that if a phone can't access to the fast boot, it means that it not allow bootloader unlocking. How can I explain, so, that I received Command not allowed every time?
Just right now, I think that my phone loses its battery level, so when I connect it to the computer, I listen the Windows sounds (when u connect a new hardware) but nothing happens, I cant find my device in the device manager neither. Then, the initial red light turns on green light and i listen the sound that indicates a device disconnecting . In addition, my phone doesnt recharge its battery right now.
So, some ideas now?
Thanks.

FeeLitoo said:
Entel logo is my operator, like Vodafone, for example. Few days ago, my phone get that logo, after "Sony" screen and then get freeze. I want to wake up my phone, I cant access it. About the ROM, it was using the stock rom. I dont think that is a driver problem, before all of this, Sony PC Companion could recognize my phone when I was trying to "repair" with it. But actually, Flash Tool doesn't recognize my phone in flash boot, but it does in fastboot. Well, I tried to flash a kernel with Flash Tool in fast boot mode, but I received the same message (FAILED: Command not allowed), reading and reading I imagine that my phone doesn't allow to unlock the bootloader. In addition, I try to unlock it officially (Sony's tutorial using IMEI, etc) but I received the same message (FAILED: Command not allowed). I read that if a phone can't access to the fast boot, it means that it not allow bootloader unlocking. How can I explain, so, that I received Command not allowed every time?
Just right now, I think that my phone loses its battery level, so when I connect it to the computer, I listen the Windows sounds (when u connect a new hardware) but nothing happens, I cant find my device in the device manager neither. Then, the initial red light turns on green light and i listen the sound that indicates a device disconnecting . In addition, my phone doesnt recharge its battery right now.
So, some ideas now?
Thanks.
Click to expand...
Click to collapse
Well first of all flashtool drivers and Pc companion drivers r diff
Ul find flashtool drivers in flashtool folder drivers..start d setup scroll down tick flashmode n fastboot mode... I don't think u have done this..n PC will detect only when its booted..to check bootloader unlockinf
> Go to dialer
> Type *#*#7378423#*#*
> Service info > Configuration
> Rooting status :
"Bootloader unlock allowed" - You can unlock your bootloader
"Bootloader unlock not allowed" - You cannot unlock your bootloader
N hv u flashed ftf ...n frankly dude y dont u just follow my instructions n stop reading **** n gt confused ! Y dont u flash ftf first..i presume u dont know what is ftf..dont read ask me
Hit thanks if i helped

Rohan purohit said:
Well first of all flashtool drivers and Pc companion drivers r diff
Ul find flashtool drivers in flashtool folder drivers..start d setup scroll down tick flashmode n fastboot mode... I don't think u have done this..n PC will detect only when its booted..to check bootloader unlockinf
> Go to dialer
> Type *#*#7378423#*#*
> Service info > Configuration
> Rooting status :
"Bootloader unlock allowed" - You can unlock your bootloader
"Bootloader unlock not allowed" - You cannot unlock your bootloader
N hv u flashed ftf ...n frankly dude y dont u just follow my instructions n stop reading **** n gt confused ! Y dont u flash ftf first..i presume u dont know what is ftf..dont read ask me
Hit thanks if i helped
Click to expand...
Click to collapse
Thanks for ur answer. Anyway, I can't go to the dialer, 'cause I can access to the phone. In addition, I check fastboot and flashboot when I install the flash tool. I just know that ftf is an extension for ROMs, but flashtool just admite it when I try to flash en flash boot, but, I CANT ACCESS TO THE FLASH BOOT ! So I try to flash some boot.img in fast boot mode, but I get that ****id message (FAILED: Command not allowed).
Thanks.

FeeLitoo said:
Thanks for ur answer. Anyway, I can't go to the dialer, 'cause I can access to the phone. In addition, I check fastboot and flashboot when I install the flash tool. I just know that ftf is an extension for ROMs, but flashtool just admite it when I try to flash en flash boot, but, I CANT ACCESS TO THE FLASH BOOT ! So I try to flash some boot.img in fast boot mode, but I get that ****id message (FAILED: Command not allowed).
Thanks.
Click to expand...
Click to collapse
Dude u got it al messed up man.. First of al pls download ftf il give d link
N teme what wiil u get by flashing boot.img..??? N as ur booloader is locked u cant do it..its like impossible al u can do with locked bootlder is root,cwm and flash ftf..that is y im saying u have half knowledge by reading elsewheree...read in xda guidea..now Simple SOLUTION FOR UR PROBLEM
FLASSHH FTF IN FLASHMODE ! cant be more specific than that...ul get ur phone back then
Next steps..n when d flash window appears ...right top side theres wipe section..uncheck data if u want ur data..if u wipe all apps contacts etc will go
...anyway nothing will happen..link.. http://forum.xda-developers.com/xperia-l/general/sony-xperia-l-flashable-ftfs-locked-t2560642..if u dont understnd flashing ftf ..read guide or ask me
Hit thanks if i helped

How can i say this? I CANT ACCESS TO THE FLASH BOOT ! Flash tool doesn't recognize my phone in flash boot! I just wanna flash the ROM, but flash it requires enter in flash boot, and I cant do this!!!! My PC doesn't recognize it!!!!

FeeLitoo said:
How can i say this? I CANT ACCESS TO THE FLASH BOOT ! Flash tool doesn't recognize my phone in flash boot! I just wanna flash the ROM, but flash it requires enter in flash boot, and I cant do this!!!! My PC doesn't recognize it!!!!
Click to expand...
Click to collapse
Did you tried with sony's pc companion or update service setup??

faizalotai said:
Did you tried with sony's pc companion or update service setup??
Click to expand...
Click to collapse
Sony PC Companion doesn't recognize my phone actually, and SUS page says that it's not longer avalaible !

FeeLitoo said:
How can i say this? I CANT ACCESS TO THE FLASH BOOT ! Flash tool doesn't recognize my phone in flash boot! I just wanna flash the ROM, but flash it requires enter in flash boot, and I cant do this!!!! My PC doesn't recognize it!!!!
Click to expand...
Click to collapse
Ok first f al its flashmode not flashboot nd second try on a diff pc or something. Where everything is alredy setup ur friends pc..get creative

And if u get green light when u connect ur phone in flashmode then its nt ur phone prob
Bt pc problem..so reinstall drivers etc.. Dl latest flashtool blah blah

Rohan purohit said:
And if u get green light when u connect ur phone in flashmode then its nt ur phone prob
Bt pc problem..so reinstall drivers etc.. Dl latest flashtool blah blah
Click to expand...
Click to collapse
I tried to install the drivers again in another computer, but the situation is the same. I installed ADK Manager, and select all recommended drivers for android devices. When I try to put my phone in flash mode (vol -) my PC sounds and I get a red light. After 30 sec aprox, the red light turns on green, and W7 sounds like a hardware disconnect. After that, Sony PC Companion and Flash tool dont recognize the flash mode that Im trying, and well, same situation.
Thanks for ur ideas. I dont know what to do XD

FeeLitoo said:
I tried to install the drivers again in another computer, but the situation is the same. I installed ADK Manager, and select all recommended drivers for android devices. When I try to put my phone in flash mode (vol -) my PC sounds and I get a red light. After 30 sec aprox, the red light turns on green, and W7 sounds like a hardware disconnect. After that, Sony PC Companion and Flash tool dont recognize the flash mode that Im trying, and well, same situation.
Thanks for ur ideas. I dont know what to do XD
Click to expand...
Click to collapse
Well thats weird .. It should turn green instantly..are u plugging in d cable while pressing d vol down button..cs red light first means u plug in without pressing..! And like i said before u dont need any other drivers than flashtool ones..so dont waste ur time ..just when d green light comes, begin d drivers setup n try

FeeLitoo said:
I tried to install the drivers again in another computer, but the situation is the same. I installed ADK Manager, and select all recommended drivers for android devices. When I try to put my phone in flash mode (vol -) my PC sounds and I get a red light. After 30 sec aprox, the red light turns on green, and W7 sounds like a hardware disconnect. After that, Sony PC Companion and Flash tool dont recognize the flash mode that Im trying, and well, same situation.
Thanks for ur ideas. I dont know what to do XD
Click to expand...
Click to collapse
Can we know what OS of the computers

faizalotai said:
Can we know what OS of the computers
Click to expand...
Click to collapse
Windows 7 both. Ill try in Ubuntu in a few hours. If u know about a nice guide in Ubuntu, or u got some new ideas, please please pleasy write some here
Thanks !!
PD: By the way, when I connect my phone to the computer, Sony PC Companion recognize it by 10 sec maybe?, but I get an error without specifications, saying: SPC was unable to connect (blabla).
EDIT: Now I connect my phone to the computer, and it turns green light instantly. My PC recognize it like Unidentified Device, searching for drivers on Windows Update and I get an error:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
I search for the device id on www.pcidatabase.com and well, I cant rescue any information about it.
Well, maybe now I can certanly know that it's a driver problem.
I will aprecciate ur new ideas

FeeLitoo said:
Windows 7 both. Ill try in Ubuntu in a few hours. If u know about a nice guide in Ubuntu, or u got some new ideas, please please pleasy write some here
Thanks !!
PD: By the way, when I connect my phone to the computer, Sony PC Companion recognize it by 10 sec maybe?, but I get an error without specifications, saying: SPC was unable to connect (blabla).
EDIT: Now I connect my phone to the computer, and it turns green light instantly. My PC recognize it like Unidentified Device, searching for drivers on Windows Update and I get an error:
I search for the device id on www.pcidatabase.com and well, I cant rescue any information about it.
Well, maybe now I can certanly know that it's a driver problem.
I will aprecciate ur new ideas
Click to expand...
Click to collapse
Y did u unplug..dude u dont follow d instructions...install drivers when windows is searching for em..bt as no drivers r installed d green light wil go..n d phn will strt charging..so remove d cable n plug it back in flashmode..

FeeLitoo said:
Windows 7 both. Ill try in Ubuntu in a few hours. If u know about a nice guide in Ubuntu, or u got some new ideas, please please pleasy write some here
Thanks !!
Click to expand...
Click to collapse
Do this and restart your pc
Used latest flashtool ver..
In flashtool folder there's drivers folder to install the driver
tick those for installing the phone driver(taoshan)
Sometimes usb's cable also can make it worst...so try play a bit..

faizalotai said:
Do this and restart your pc
Used latest flashtool ver..
In flashtool folder there's drivers folder to install the driver
tick those for installing the phone driver(taoshan)
Sometimes usb's cable also can make it worst...so try play a bit..
Click to expand...
Click to collapse
I uninstall all USB drivers from Device Manager, and re-install all drivers that I need (I guess) + the drivers that u suggested me, but I get the same situation . Reading on internet, some people say that if I received the error "Device unplugged" on "Unidentified Device", probably it happens 'cause the device has not the enough energy to turn on. It can explain a lot of things, but certainly I dont know how to charge my phone. Connecting it to the energy doesn't work :C. Maybe I just have to leave it on Sony Technical Support, but well... I dont know what more to do
Sorry for this, and thanks for ur help

[Q][Solved]Samsung Infuse 4g I997 BootLoader Corrupted, Please HELP!

Hello there friends. I have accidentally corrupted the bootlader of the phone.
I have trying to flash the phone using Odin and in the bootloader I selected AP file. I did not read it carefully.
Now the phone's bootloader is corrupted. It Show this on the screen
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
When I connect it with PC it detects and COM port detects too. Can I repair the bootloader of this phone. Please help me. I will be very grateful.
Thank you

saaqirajput said:
Hello there friends. I have accidentally corrupted the bootlader of the phone.
I have trying to flash the phone using Odin and in the bootloader I selected AP file. I did not read it carefully.
Now the phone's bootloader is corrupted. It Show this on the screen
When I connect it with PC it detects and COM port detects too. Can I repair the bootloader of this phone. Please help me. I will be very grateful.
Thank you
Click to expand...
Click to collapse
If you can still go into download mode, all is not lost
Try the AT&T unbrick using he following mirror page:
http://forum.xda-developers.com/infuse-4g/general/mirror-development-files-t3011627
Hope this helps.

joel.maxuel said:
If you can still go into download mode, all is not lost
Try the AT&T unbrick using he following mirror page:
http://forum.xda-developers.com/infuse-4g/general/mirror-development-files-t3011627
Hope this helps.
Click to expand...
Click to collapse
Last night it was being detected and Com Port was also showing but now it is not. I haven't done anything to the phone between this time.
When I plug in the cable phone detects but com port does not show up. Please guide me. Thanks for your answer

saaqirajput said:
Last night it was being detected and Com Port was also showing but now it is not. I haven't done anything to the phone between this time.
When I plug in the cable phone detects but com port does not show up. Please guide me. Thanks for your answer
Click to expand...
Click to collapse
Silly question...are you in Download Mode now? Easy way to achieve is to pull and reinsert battery, then hold down both volume buttons while plugging in the USB cable.
If you are there and no COM port connection, then are you using a different USB port (or PC) since last time? It is said that Download Mode does not like USB 3.0.
Hope this helps.

joel.maxuel said:
Silly question...are you in Download Mode now? Easy way to achieve is to pull and reinsert battery, then hold down both volume buttons while plugging in the USB cable.
If you are there and no COM port connection, then are you using a different USB port (or PC) since last time? It is said that Download Mode does not like USB 3.0.
Hope this helps.
Click to expand...
Click to collapse
No sir phone it is not getting in download mode.
Like I said last night it was going into download mode today it is not.
Some hardware is detected but com port is not being detected. No samsung port in device manager.
I think the bootloader is corrupted. As I said I opened the PDA file in bootloader section and then very very stupidly pressed the start button.
It flashed 17 percent and then stopped. I then again even more stupidly (like it is even possible to be this much if an idiot, but evidently I am) disconnected pulled the battery out and tried to get into download mode.
It did screen was messed up showing rainbows but Odin detected the phone.
Then I made this post after the first reply I tried to go into download mode so something is detected but not the com port.
So I think it is safe to say that the bootloader is corrupted. Now is there a way to repair the bootloader without the ort jag?
Thank you very much for your answer and your time.

saaqirajput said:
No sir phone it is not getting in download mode.
Like I said last night it was going into download mode today it is not.
Some hardware is detected but com port is not being detected. No samsung port in device manager.
I think the bootloader is corrupted. As I said I opened the PDA file in bootloader section and then very very stupidly pressed the start button.
It flashed 17 percent and then stopped. I then again even more stupidly (like it is even possible to be this much if an idiot, but evidently I am) disconnected pulled the battery out and tried to get into download mode.
It did screen was messed up showing rainbows but Odin detected the phone.
Then I made this post after the first reply I tried to go into download mode so something is detected but not the com port.
So I think it is safe to say that the bootloader is corrupted. Now is there a way to repair the bootloader without the ort jag?
Thank you very much for your answer and your time.
Click to expand...
Click to collapse
Download mode is supposed to be independent of the bootloader, so if you still cannot get into Download Mode, you should luck out with a jig.

joel.maxuel said:
Download mode is supposed to be independent of the bootloader, so if you still cannot get into Download Mode, you should luck out with a jig.
Click to expand...
Click to collapse
Wait you mean even if I have messed up the bootloader I can still get into download mode. Wow this is great news. Thank you very much.
Can you please tell me if I can create this jig thingie, do you know a guide because I am pretty sure I am never going to find one here in my country.
Thank you very much for your help

I have seen some videos looks pretty simple just put a 300 k ohm resistor between the 4th and 5th leg.
I will try and make the jig and post the result tomorrow.
@joel.maxuel thank you very much for your time.

joel.maxuel said:
If you can still go into download mode, all is not lost
Try the AT&T unbrick using he following mirror page:
http://forum.xda-developers.com/infuse-4g/general/mirror-development-files-t3011627
Hope this helps.
Click to expand...
Click to collapse
Hello sir, if I am able to get into download mode will flashing the Phone and PDA files from your package be enough or do I need to find the bootloader too from somewhere?

saaqirajput said:
Hello sir, if I am able to get into download mode will flashing the Phone and PDA files from your package be enough or do I need to find the bootloader too from somewhere?
Click to expand...
Click to collapse
The Unbrick package rescues half-trashed bootloaders (among other things) from what I read in other parts of the forum, so you should be fine. You may, however, need to flash a back to root package (my mirror has option C, albeit in an extracted mess) in order to get system working properly again. When I had my Infuse, it was the Rogers version, so I could never use the AT&T packages (so I never knew first-hand the difference between the unbrick and back-to-stock).
Can cross that bridge when you come to it. Hope this helps.

Okay I am having trouble making a jig. I could not find a proper 301 k resistor to I stiched 3 100k resistors. Somehow it is not working. Maybe the USB connector us faulty. It had four connectors on the main side and 1 on the other.
I will change the USB connector and try again.
Thank you very very much

saaqirajput said:
Okay I am having trouble making a jig. I could not find a proper 301 k resistor to I stiched 3 100k resistors. Somehow it is not working. Maybe the USB connector us faulty. It had four connectors on the main side and 1 on the other.
I will change the USB connector and try again.
Thank you very very much
Click to expand...
Click to collapse
Hmmm, that should work... 301K is pretty specific but there are a lot of variance with resistors, and unless the variance is being amplified by daisy-chaining three 100K's, there shouldn't be a problem. If you have a multimeter, you should check the resistance readout to see if it is off by much.
If not, then it comes back to my original theory. Jacked bootloaders can be modified/restored via ODIN or Heimdall, although the problem screen you have (in the end, a really jacked bootloader) isn't the same as what I was going on (which was the wrong, partially functioning bootloader).
I thought the Download/Odin mode was called off at the Modem level (before the bootloader), but I may be wrong. If so (that is, if your jig does not work), you may need a JTAG service after all.
Sorry for any wasted effort.

I could not find a 5 pin USB connector, I tore apart at least 7 USB cables and all of them ONLY had 4 pins.
I think I am going to have to tear apart the original cable of my S3 and I really really don't want to do that.
I will post the final results on Friday evening

Okay I found a 5 pin connector and made a jig but it did not work. Looks like I a going to have to pay for a jtag service.
Thank you again for all your help

Fixed my Phone
All right I have finally fixed it. The problem was I had some newer or I don't know older driver versions installed. I installed i997 Kies mini and installed the driver that came with that software.
And as soon as I connected the phone while pressing Vol Up + Vol Down computer detected it and odin detected it too. Then I installed your provided firmware.
It is okay now. It is working, there is a rainbow effect every time I turn it on but that is okay. Only recovery is not working. I can't go into recovery.
Everything else is working fine. Thank you very much for all your help.

[Bootloop] Sony XZ Premium

Hi, I need help with my XZ Premium. After updating an OTA the phone went into bootloop mode. I have tried to repair from Companion and Flashtools with several Firmwares and nothing has worked. When it turns on, it enters the Sony logo and it restarts the blue led ignition and then green led. Any help please? Thanks in advance and sorry for my English

Have you tried flashing a new firmware?

RickyGrizu said:
Any help please? Thanks in advance and sorry for my English
Click to expand...
Click to collapse
Download Xperiafirm, find the latest 'custom' build for your region and download that.
Download Newflasher and put a copy of all the files into the same folder as your firmware.
Delete userdataxxx.sin. This keeps your data partition.
Unplug phone from PC.
Turn phone off completely. Volume up (+) and power until the phone vibrates three times.
Start Newflasher.exe
Hold volume up(+) on phone while plugging in USB lead.
Let Newflasher do its thing, takes 5 minutes mimum, don't unplug until you're told to.
You might need the Sony drivers if you haven't done this before.
Edit: I don't understand how you can go wrong with Xperia companion, it tells you what to do. The fact that your phone fires up means that the boot sector is working fine, along with flashboot. I'm guessing that you're not turning the phone off properly before you try any of the flashboot procedures.

Didgesteve said:
Download Xperiafirm, find the latest 'custom' build for your region and download that.
Download Newflasher and put a copy of all the files into the same folder as your firmware.
Delete userdataxxx.sin. This keeps your data partition.
Unplug phone from PC.
Turn phone off completely. Volume up (+) and power until the phone vibrates three times.
Start Newflasher.exe
Hold volume up(+) on phone while plugging in USB lead.
Let Newflasher do its thing, takes 5 minutes mimum, don't unplug until you're told to.
You might need the Sony drivers if you haven't done this before.
Edit: I don't understand how you can go wrong with Xperia companion, it tells you what to do. The fact that your phone fires up means that the boot sector is working fine, along with flashboot. I'm guessing that you're not turning the phone off properly before you try any of the flashboot procedures.
Click to expand...
Click to collapse
Thanks for answering so quickly. I tell you the following. I try to do what you say but I get an error. I looked for information about it and it tells me that I have to have the "Activated Debugging" which I do not have active and I can not start the S.O to activate it. I do not have the Bootloader unlocked either. I await answers, thanks!

RickyGrizu said:
Thanks for answering so quickly. I tell you the following. I try to do what you say but I get an error. I looked for information about it and it tells me that I have to have the "Activated Debugging" which I do not have active and I can not start the S.O to activate it. I do not have the Bootloader unlocked either. I await answers, thanks!
Click to expand...
Click to collapse
Don't forget to install the drivers

raven213 said:
Don't forget to install the drivers
Click to expand...
Click to collapse
Yes, I have everything installed correctly

raven213 said:
Have you tried flashing a new firmware?
Click to expand...
Click to collapse
What do you mean with a new firmware?

RickyGrizu said:
Thanks for answering so quickly. I tell you the following. I try to do what you say but I get an error. I looked for information about it and it tells me that I have to have the "Activated Debugging" which I do not have active and I can not start the S.O to activate it. I do not have the Bootloader unlocked either. I await answers, thanks!
Click to expand...
Click to collapse
You shouldn't nneed debugging enabled, you would get that error if you were plugging the phone in with the volume down(-). But you're not going into recovery, you want volume up(+) into flash. You don't need USB debug enabled for flash.

RickyGrizu said:
Hi, I need help with my XZ Premium. After updating an OTA the phone went into bootloop mode. I have tried to repair from Companion and Flashtools with several Firmwares and nothing has worked. When it turns on, it enters the Sony logo and it restarts the blue led ignition and then green led. Any help please? Thanks in advance and sorry for my English
Click to expand...
Click to collapse
all of the methods listed so far are tedious, but everyone is ignoring the easiest and best one: download the Xperia Flash Tool from Sony Developer World, plug in your phone (I forgot the key combination), and it will automatically find the right and most recent, Sony-approved firmware, and all that you have to do is press okay. I get my XZP into bootloops about every month, and every time all that I have to do is plug it in and press okay.

b.rad42 said:
all of the methods listed so far are tedious, but everyone is ignoring the easiest and best one: download the Xperia Flash Tool from Sony Developer World, plug in your phone (I forgot the key combination), and it will automatically find the right and most recent, Sony-approved firmware, and all that you have to do is press okay. I get my XZP into bootloops about every month, and every time all that I have to do is plug it in and press okay.
Click to expand...
Click to collapse
But to use the Xperia Flash should not have the bootloader unlocked? because if so, I do not have it unlocked or I can unlock it. Thank you!

RickyGrizu said:
But to use the Xperia Flash should not have the bootloader unlocked? because if so, I do not have it unlocked or I can unlock it. Thank you!
Click to expand...
Click to collapse
ah. that makes more sense. in that case, you can't use newflasher or flashtool as they require an unlocked bootloader. personally, i'd contact sony, as your warranty should still be valid. if they won't help, you can always go to sony developer world and get a bootloader unlock code. then use fastboot to unlock your bootloader in fastboot mode (works even while it's in a bootloop) (if you need the commands lmk). after that you can use sony's flash tool, flashtool, or newflasher.

b.rad42 said:
ah. that makes more sense. in that case, you can't use newflasher or flashtool as they require an unlocked bootloader. personally, i'd contact sony, as your warranty should still be valid. if they won't help, you can always go to sony developer world and get a bootloader unlock code. then use fastboot to unlock your bootloader in fastboot mode (works even while it's in a bootloop) (if you need the commands lmk). after that you can use sony's flash tool, flashtool, or newflasher.
Click to expand...
Click to collapse
I think there's some confsion between Sony's Emma and Xperia companion.
One is used to repair and back up your phone and the other is for flashing firmware builds. Niether of them require the bootloader to be unlocked.
Flashtool and Newflasher can also be used without unlocking the bootloader.
The difficult thing seems to be turning the phone off properly before trying to connect it to Xperia companion for repair. But there are instuctions in this thread and the linked thrreads above. At some point you've got to decide if flashing this is within your skillset, if not then send it back for repair. Make sure you've registered your phone, then call the helpline.

{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Didgesteve said:
I think there's some confsion between Sony's Emma and Xperia companion.
One is used to repair and back up your phone and the other is for flashing firmware builds. Niether of them require the bootloader to be unlocked.
Flashtool and Newflasher can also be used without unlocking the bootloader.
The difficult thing seems to be turning the phone off properly before trying to connect it to Xperia companion for repair. But there are instuctions in this thread and the linked thrreads above. At some point you've got to decide if flashing this is within your skillset, if not then send it back for repair. Make sure you've registered your phone, then call the helpline.
Click to expand...
Click to collapse
This is what appears to me in Emma ...

RickyGrizu said:
This is what appears to me in Emma ...
Click to expand...
Click to collapse
What are you trying to do with Emma? that's a developers tool. I recomend Xperia companion to get your phone up and running again.

Didgesteve said:
What are you trying to do with Emma? that's a developers tool. I recomend Xperia companion to get your phone up and running again.
Click to expand...
Click to collapse
It does not work!

Didgesteve said:
What are you trying to do with Emma? that's a developers tool. I recomend Xperia companion to get your phone up and running again.
Click to expand...
Click to collapse
RickyGrizu said:
It does not work!
Click to expand...
Click to collapse
i have the same pb and i need bootloader unlock code for g8142
imei 357008081440044

Hi Everyone! Actually ive also the same issues with my Sony Xperia XZ Premium , i tried to reflash it many times, but it didnt helped. I used the repair process also via PC Companion, after the end, nothing went changed. The Phone is already broken since two years, i tried so many ways to fix it, but nothing helps. Im just wanna to make a backup or something, but i cant achieve the storage of the phone.
---------- Post added at 08:16 PM ---------- Previous post was at 07:55 PM ----------
clubshop said:
i have the same pb and i need bootloader unlock code for g8142
imei 357008081440044
Click to expand...
Click to collapse
Hi! There is your unlock code: 595EEC6F3A360C86 But anyway on this site you can generate at everytime a new one. on the sony developer site you can find many more informations about the Emma Software, and so on. What is happend with your Phone? In my case, it was on the charger, and the cable got little bit burned or melted, and since that the phone is in the bootloop, its restarting repeatedly without end. It shows a Sony Logo, and thats all.... Sad story, it happend already two years earlier, but it was only 6 months old...

Ok, it seems this thread is a bit older but i have the same Problem, search the Web and try to fix it X Times with flashing by using all the WWW is giving me to use. Nothing off all that works but then i found out the Solution.
My exact Problem was when i start the XZP, it boot up, i can see the Sony Logo for a few seconds (5-10) then led flashes very Quick greenblue and green then it resatarts and the Bootloop begins.
I Unplug all the Flex wires inside and after that i plug in only Battery and Power/Volume Buttons. after that, the XZP starts Normal. after that i plugged in one Flex after another and finally find out, the System stucks with the Main (rear) Camera plugged in on the Board.
I think it depends on a Shortcut on the Camera or the Phone is fall to the Ground.
I change the Camera to a new one and the Problem is fixed.
Maybe this can also be a Solutin for other series XZ Phones with the same problem.
I hope this is also helpfull for others.
Sorry for my bad english, i can wrirte it also in german if wished and maybey someone can Translate it correctly.