[DISASTER RECOVERY][v3.6] Getting your Z1/ZU/Z/ZL back to life!

[mR.[hyDe]]

Alright , will get one magnet charger asap

But case is this case happen frequently on sony?

Sent from my GT-I9100G using XDA Free mobile app

 

[rustyballz]

I have got a bit of trouble I'm trying to sort out.

Managed to get my phone stuck on the Sony logo.

I've had a fiddle, and managed to get FlashTool to see it in fastboot mode, but not in the other mode.

Where can I find a stock sony kernel to flash to try and save this phone?

Any help greatly appreciated.

 

[kulvertti]

I have got a bit of trouble I'm trying to sort out.

Managed to get my phone stuck on the Sony logo.

I've had a fiddle, and managed to get FlashTool to see it in fastboot mode, but not in the other mode.

Where can I find a stock sony kernel to flash to try and save this phone?

Any help greatly appreciated.

May I suggest here:

http://forum.xda-developers.com/showthread.php?t=2834142

 

[rustyballz]

May I suggest here:

http://forum.xda-developers.com/showthread.php?t=2834142

I have the phone up and running now, however, it now does not read my sim, and has no wifi functionality.

Getting there, slowly!

 

[mR.[hyDe]]

@mR.[hyDe]

If you have a charging dock or have anything to use the charge dock port on the side of your device, connect it and leave it connected, while turned OFF (it will try to power up by itself, just ignore that!), for a night WITHOUT touching it in the mean time.

I'm sure it will kick back in to life then. To me (because of the RED LED messages you get, blinking it means something!!) your mobile screams for juice because the battery is too empty for it to even boot to the charge cycle using the USB port.

so for my case izzit i have to charge it, or let the battery empty first?

 

[[NUT]]

so for my case izzit i have to charge it, or let the battery empty first?

Charge it, if the battery goes totally empty it can get damaged and the only solution then is to replace it.

 

[[NUT]]

I have the phone up and running now, however, it now does not read my sim, and has no wifi functionality.

Getting there, slowly!

What model do you have?

 

[rustyballz]

What model do you have?

Z1

 

[mR.[hyDe]]

Charge it, if the battery goes totally empty it can get damaged and the only solution then is to replace it.

alright, im charging it for 5 hours already but one question, i shall charger it until what stage ?

 

[[NUT]]

Z1

What firmware are you trying to flash? If using an FTF, did you flash ALL of it? (and I really mean, ALL of it!)

alright, im charging it for 5 hours already but one question, i shall charger it until what stage ?

Well, 2 things:

First: IF it fixed your battery predicament, it should now show you a battery charge icon on screen when you short press your power button, if so, you can power up your mobile, while it still is in the dock, by long pressing the power button. It will continue boot from that point.

Second: ALWAYS have your mobile charged 100% before you start tinkering and flashing stuff in the future. Your battery does not get charged while you are in flash- or fastbootmode... XZDR included recoveries do however allow you to charge from within the recoveries. Just remember that the charge cycle is the slow one, so if the recovery is performing very CPU intensive things (which really is just about everything except sitting idle!), it will still deplete your battery.

 

[mR.[hyDe]]

What is a XZDR?

I wont touch the phone until it has 12 hours of charging.
But there is some changes .
The pattern now change from 1. (red led short blink ) + 2. ( red led stay for 5 seconds) → 3. (red led short blink) + (3 vibration) (the cycle very fast after every 3 second)→ 4. (red led short blink) + (3 vibration) (the cycle very long like once in a minutes) → 5. Nothing happens but the charging seems weird ( I uploaded short video link http://youtu.be/_Qx5t13Oj9g thats a third party 4 port charger which supply 2.1A. Red light indicate charging, blue light indicate ready, it keep on blink or flash like so)



I wonder how can u know all about this (behaviour of the soft brick) ? Experience ? Hahaha

Sent from my GT-I9100G using XDA Free mobile app

 

[[NUT]]

What is a XZDR?

I wont touch the phone until it has 12 hours of charging.
But there is some changes .
The pattern now change from 1. (red led short blink ) + 2. ( red led stay for 5 seconds) → 3. (red led short blink) + (3 vibration) (the cycle very fast after every 3 second)→ 4. (red led short blink) + (3 vibration) (the cycle very long like once in a minutes) → 5. Nothing happens but the charging seems weird ( I uploaded short video link http://youtu.be/_Qx5t13Oj9g thats a third party 4 port charger which supply 2.1A. Red light indicate charging, blue light indicate ready, it keep on blink or flash like so)



I wonder how can u know all about this (behaviour of the soft brick) ? Experience ? Hahaha

Sent from my GT-I9100G using XDA Free mobile app

Unfortunately, yes :angel:

If your mobile won't power on after this, you will have to use a guide how to open up your mobile and charge the battery pack directly. It will be your last chance to resurrect your mobile before having to replace the battery.

The Guide to open up your mobile: https://www.youtube.com/watch?v=q4jQzuSOXM8

You'll have to find the guide how to charge the battery yourself

-EDIT-

Bonus: if you have to replace your battery: http://www.witrigs.com/oem-battery-for-sony-xperia-z-ultra

-- EDIT 2 --

XZDR is XZDualRecovery ... one of my projects on XDA

 

[mR.[hyDe]]

Unfortunately, yes :angel:

If your mobile won't power on after this, you will have to use a guide how to open up your mobile and charge the battery pack directly. It will be your last chance to resurrect your mobile before having to replace the battery.

The Guide to open up your mobile: https://www.youtube.com/watch?v=q4jQzuSOXM8

You'll have to find the guide how to charge the battery yourself

-EDIT-

Bonus: if you have to replace your battery: http://www.witrigs.com/oem-battery-for-sony-xperia-z-ultra

-- EDIT 2 --

XZDR is XZDualRecovery ... one of my projects on XDA

So sad, the charging led still blinking the same method after 20 hrs of charging, no sign of hope hahaha
i wonder what will happend if i plug in both magnetic and usb chargin together ?

EDIT
just watched the video and wonder how easy to remove the battery cover so i got my self and heat blower and a suction tool and remove em
here i attach my progress

unplug 8 mins
then charged 2 mins
then flashed

09/000/2014 03:00:21 - INFO  - Selected Bundle for Sony Xperia Z Ultra (C6833). FW release : 14.1.B.2.257. Customization : Generic SG
09/000/2014 03:00:21 - INFO  - Preparing files for flashing
09/000/2014 03:00:22 - INFO  - Please connect your device into flashmode.
09/001/2014 03:01:50 - INFO  - Device connected in flash mode
09/001/2014 03:01:51 - INFO  - Opening device for R/W
09/001/2014 03:01:51 - INFO  - Reading device information
09/001/2014 03:01:51 - INFO  - Phone ready for flashmode operations.
09/001/2014 03:01:51 - INFO  - Current device : C6833 - EP7331CHA8 - 1276-2235_R1B - 1274-7565_14.2.A.0.290 - EURO-LTE_14.2.A.0.290
09/001/2014 03:01:51 - INFO  - Start Flashing
09/001/2014 03:01:51 - INFO  - Processing loader.sin
09/001/2014 03:01:51 - INFO  -     Checking header
09/001/2014 03:01:51 - INFO  -     Flashing data
09/001/2014 03:01:51 - INFO  - Processing of loader.sin finished.
09/001/2014 03:01:51 - INFO  - Loader : S1_Root_6732 - Version : MSM8974_23 / Boot version : S1_Boot_MSM8974_Rhine1.2_LA1.04_12 / Bootloader status : ROOTABLE
09/001/2014 03:01:51 - INFO  - No bootdelivery to send
09/001/2014 03:01:51 - INFO  - Processing kernel.sin
09/001/2014 03:01:52 - INFO  -     Checking header
09/001/2014 03:01:52 - INFO  -     Flashing data
09/001/2014 03:01:53 - INFO  - Processing of kernel.sin finished.
09/001/2014 03:01:53 - INFO  - Processing rpm.sin
09/001/2014 03:01:53 - INFO  -     Checking header
09/001/2014 03:01:53 - INFO  -     Flashing data
09/001/2014 03:01:53 - INFO  - Processing of rpm.sin finished.
09/001/2014 03:01:53 - INFO  - Processing apps_log.sin
09/001/2014 03:01:53 - INFO  -     Checking header
09/001/2014 03:01:53 - INFO  -     Flashing data
09/001/2014 03:01:54 - INFO  - Processing of apps_log.sin finished.
09/001/2014 03:01:54 - INFO  - Processing cache.sin
09/001/2014 03:01:54 - INFO  -     Checking header
09/001/2014 03:01:54 - INFO  -     Flashing data
09/001/2014 03:01:55 - INFO  - Processing of cache.sin finished.
09/001/2014 03:01:55 - INFO  - Processing userdata.sin
09/001/2014 03:01:55 - INFO  -     Checking header
09/001/2014 03:01:55 - INFO  -     Flashing data
09/002/2014 03:02:18 - INFO  - Processing of userdata.sin finished.
09/002/2014 03:02:18 - INFO  - Ending flash session
09/002/2014 03:02:18 - INFO  - Flashing finished.
09/002/2014 03:02:18 - INFO  - Please unplug and start your phone
09/002/2014 03:02:18 - INFO  - For flashtool, Unknown Sources and Debugging must be checked in phone settings
09/002/2014 03:02:19 - INFO  - Device connected in flash mode
09/002/2014 03:02:35 - INFO  - Device disconnected

then charging for two mins
it goes back to red led blink 3 times(softbrick i guess)

again unplug for 8 mins

9/031/2014 03:31:16 - INFO  - Selected Bundle for Sony Xperia Z Ultra (C6833). FW release : 14.1.B.2.257. Customization : Generic SG
09/031/2014 03:31:16 - INFO  - Preparing files for flashing
09/031/2014 03:31:25 - INFO  - Please connect your device into flashmode.
09/031/2014 03:31:29 - INFO  - Device connected in flash mode
09/031/2014 03:31:29 - INFO  - Opening device for R/W
09/031/2014 03:31:29 - INFO  - Device connected in flash mode
09/031/2014 03:31:30 - INFO  - Reading device information
09/031/2014 03:31:30 - INFO  - Phone ready for flashmode operations.
09/031/2014 03:31:30 - INFO  - Current device : C6833 - EP7331CHA8 - 1276-2235_R1B - 1274-7565_14.2.A.0.290 - EURO-LTE_14.2.A.0.290
09/031/2014 03:31:30 - INFO  - Start Flashing
09/031/2014 03:31:30 - INFO  - Processing loader.sin
09/031/2014 03:31:30 - INFO  -     Checking header
09/031/2014 03:31:30 - INFO  -     Flashing data
09/031/2014 03:31:30 - INFO  - Processing of loader.sin finished.
09/031/2014 03:31:30 - INFO  - Loader : S1_Root_6732 - Version : MSM8974_23 / Boot version : S1_Boot_MSM8974_Rhine1.2_LA1.04_12 / Bootloader status : ROOTABLE
09/031/2014 03:31:30 - INFO  - No bootdelivery to send
09/031/2014 03:31:31 - INFO  - Processing kernel.sin
09/031/2014 03:31:31 - INFO  -     Checking header
09/031/2014 03:31:31 - INFO  -     Flashing data
09/031/2014 03:31:32 - INFO  - Processing of kernel.sin finished.
09/031/2014 03:31:32 - INFO  - Processing rpm.sin
09/031/2014 03:31:32 - INFO  -     Checking header
09/031/2014 03:31:32 - INFO  -     Flashing data
09/031/2014 03:31:32 - INFO  - Processing of rpm.sin finished.
09/031/2014 03:31:32 - INFO  - Processing apps_log.sin
09/031/2014 03:31:32 - INFO  -     Checking header
09/031/2014 03:31:32 - INFO  -     Flashing data
09/031/2014 03:31:33 - INFO  - Processing of apps_log.sin finished.
09/031/2014 03:31:33 - INFO  - Processing cache.sin
09/031/2014 03:31:33 - INFO  -     Checking header
09/031/2014 03:31:33 - INFO  -     Flashing data
09/031/2014 03:31:34 - INFO  - Processing of cache.sin finished.
09/031/2014 03:31:34 - INFO  - Processing userdata.sin
09/031/2014 03:31:34 - INFO  -     Checking header
09/031/2014 03:31:34 - INFO  -     Flashing data
09/032/2014 03:32:03 - INFO  - Processing of userdata.sin finished.
09/032/2014 03:32:03 - INFO  - Ending flash session
09/032/2014 03:32:03 - INFO  - Flashing finished.
09/032/2014 03:32:03 - INFO  - Please unplug and start your phone
09/032/2014 03:32:03 - INFO  - For flashtool, Unknown Sources and Debugging must be checked in phone settings
09/032/2014 03:32:03 - INFO  - Device connected in flash mode
09/032/2014 03:32:07 - INFO  - Device disconnected

charged for 1 hrs 18 mins,its 50% already so i try to flash the whole then something went wrong which i bold the code wrap

09/047/2014 04:47:12 - INFO  - Selected Bundle for [B]Sony Xperia Z Ultra (C6833). FW release : 14.1.B.2.257. Customization : Generic SG[/B]
09/047/2014 04:47:12 - INFO  - Preparing files for flashing
09/048/2014 04:48:33 - INFO  - Please connect your device into flashmode.
09/048/2014 04:48:48 - INFO  - Device connected in flash mode
09/048/2014 04:48:48 - INFO  - Opening device for R/W
09/048/2014 04:48:49 - INFO  - Reading device information
09/048/2014 04:48:50 - INFO  - Unable to read from phone after having opened it.
09/048/2014 04:48:50 - INFO  - trying to continue anyway
09/048/2014 04:48:50 - INFO  - Start Flashing
09/048/2014 04:48:50 - INFO  - Processing loader.sin
09/048/2014 04:48:50 - INFO  -     Checking header
09/048/2014 04:48:50 - ERROR - Processing of loader.sin finished with errors.
09/048/2014 04:48:50 - INFO  - Ending flash session
09/048/2014 04:48:50 - ERROR - Error in processHeader : 6 : The handle is invalid. 
09/048/2014 04:48:50 - ERROR - Error flashing. Aborted
09/048/2014 04:48:51 - INFO  - Device disconnected
09/048/2014 04:48:53 - INFO  - Device connected in flash mode
09/048/2014 04:48:54 - INFO  - Device disconnected
09/048/2014 04:48:58 - INFO  - Device connected in flash mode
09/048/2014 04:48:59 - INFO  - Device disconnected

0

9/049/2014 04:49:37 - INFO  - Selected Bundle for Sony Xperia Z Ultra (C6833). FW release : 14.1.B.2.257. Customization : Generic SG
09/049/2014 04:49:37 - INFO  - Preparing files for flashing
09/049/2014 04:49:38 - INFO  - Please connect your device into flashmode.
09/049/2014 04:49:44 - INFO  - Device connected in flash mode
09/049/2014 04:49:44 - INFO  - Opening device for R/W
09/049/2014 04:49:44 - INFO  - Reading device information
09/049/2014 04:49:45 - INFO  - Phone ready for flashmode operations.
09/049/2014 04:49:45 - INFO  - Current device : C6833 - EP7331CHA8 - 1276-2235_R1B - 1274-7565_14.2.A.0.290 - EURO-LTE_14.2.A.0.290
09/049/2014 04:49:45 - INFO  - Start Flashing
09/049/2014 04:49:45 - INFO  - Processing loader.sin
09/049/2014 04:49:45 - INFO  -     Checking header
09/049/2014 04:49:45 - INFO  -     Flashing data
09/049/2014 04:49:45 - INFO  - Processing of loader.sin finished.
09/049/2014 04:49:45 - INFO  - Loader : S1_Root_6732 - Version : MSM8974_23 / Boot version : S1_Boot_MSM8974_Rhine1.2_LA1.04_12 / Bootloader status : ROOTABLE
09/049/2014 04:49:46 - INFO  - No bootdelivery to send
09/049/2014 04:49:46 - INFO  - Processing kernel.sin
09/049/2014 04:49:46 - INFO  -     Checking header
09/049/2014 04:49:46 - ERROR - Processing of kernel.sin finished with errors.
09/049/2014 04:49:46 - INFO  - Ending flash session
09/049/2014 04:49:46 - ERROR - Error in processHeader : 2 : The system cannot find the file specified. 
09/049/2014 04:49:46 - ERROR - Error flashing. Aborted
09/049/2014 04:49:46 - INFO  - Device disconnected
09/049/2014 04:49:50 - INFO  - Device connected in flash mode
09/049/2014 04:49:51 - INFO  - Device disconnected

09/050/2014 04:50:02 - INFO  - Selected Bundle for Sony Xperia Z Ultra (C6833). FW release : 14.2.A.0.290. Customization : CE
09/050/2014 04:50:02 - INFO  - Preparing files for flashing
09/050/2014 04:50:07 - INFO  - Please connect your device into flashmode.
09/050/2014 04:50:14 - INFO  - Device connected in flash mode
09/050/2014 04:50:14 - INFO  - Opening device for R/W
09/050/2014 04:50:14 - INFO  - Reading device information
09/050/2014 04:50:14 - INFO  - Phone ready for flashmode operations.
09/050/2014 04:50:14 - INFO  - Current device : C6833 - EP7331CHA8 - 1276-2235_R1B - 1274-7565_14.2.A.0.290 - EURO-LTE_14.2.A.0.290
09/050/2014 04:50:14 - INFO  - Start Flashing
09/050/2014 04:50:14 - INFO  - Processing loader.sin
09/050/2014 04:50:14 - INFO  -     Checking header
09/050/2014 04:50:14 - INFO  -     Flashing data
09/050/2014 04:50:14 - INFO  - Processing of loader.sin finished.
09/050/2014 04:50:15 - INFO  - Loader : S1_Root_6732 - Version : MSM8974_23 / Boot version : S1_Boot_MSM8974_Rhine1.2_LA1.04_12 / Bootloader status : ROOTABLE
09/050/2014 04:50:15 - INFO  - No bootdelivery to send
09/050/2014 04:50:15 - INFO  - Processing kernel.sin
09/050/2014 04:50:15 - INFO  -     Checking header
09/050/2014 04:50:15 - INFO  -     Flashing data
09/050/2014 04:50:15 - ERROR - Processing of kernel.sin finished with errors.
09/050/2014 04:50:15 - INFO  - Ending flash session
09/050/2014 04:50:15 - ERROR - 31 : A device attached to the system is not functioning. 
09/050/2014 04:50:15 - ERROR - Error flashing. Aborted
09/050/2014 04:50:15 - INFO  - Device disconnected

09/050/2014 04:50:25 - INFO  - Please connect your device into flashmode.
09/050/2014 04:50:32 - INFO  - Device connected in flash mode
09/050/2014 04:50:32 - INFO  - Opening device for R/W
09/050/2014 04:50:33 - INFO  - Reading device information
09/050/2014 04:50:33 - INFO  - Phone ready for flashmode operations.
09/050/2014 04:50:33 - INFO  - Current device : C6833 - EP7331CHA8 - 1276-2235_R1B - 1274-7565_14.2.A.0.290 - EURO-LTE_14.2.A.0.290
09/050/2014 04:50:48 - INFO  - Processing loader.sin
09/050/2014 04:50:48 - INFO  -     Checking header
09/050/2014 04:50:48 - ERROR - Processing of loader.sin finished with errors.
09/050/2014 04:50:48 - ERROR - Error in processHeader : 22 : The device does not recognize the command. 
09/050/2014 04:50:48 - INFO  - Your phone bootloader cannot be officially unlocked
09/050/2014 04:50:48 - INFO  - You can now unplug and restart your phone
09/052/2014 04:52:36 - INFO  - Selected Bundle for Sony Xperia Z Ultra (C6833). FW release : 14.2.A.0.290. Customization : CE
09/052/2014 04:52:36 - INFO  - Preparing files for flashing
09/052/2014 04:52:37 - INFO  - Please connect your device into flashmode.
09/052/2014 04:52:38 - INFO  - Opening device for R/W
09/052/2014 04:52:38 - INFO  - Reading device information
09/052/2014 04:52:38 - INFO  - Unable to read from phone after having opened it.
09/052/2014 04:52:38 - INFO  - trying to continue anyway
09/052/2014 04:52:38 - INFO  - Start Flashing
09/052/2014 04:52:38 - INFO  - Processing loader.sin
09/052/2014 04:52:38 - INFO  -     Checking header
09/052/2014 04:52:38 - ERROR - Processing of loader.sin finished with errors.
09/052/2014 04:52:38 - INFO  - Ending flash session
09/052/2014 04:52:38 - ERROR - Error in processHeader : 6 : The handle is invalid. 
09/052/2014 04:52:38 - ERROR - Error flashing. Aborted
09/052/2014 04:52:38 - INFO  - Device disconnected
09/052/2014 04:52:42 - INFO  - Device connected in flash mode
09/052/2014 04:52:44 - INFO  - Device disconnected
09/052/2014 04:52:47 - INFO  - Device connected in flash mode
09/052/2014 04:52:49 - INFO  - Device disconnected
09/052/2014 04:52:52 - INFO  - Device connected in flash mode
09/052/2014 04:52:54 - INFO  - Device disconnected
09/052/2014 04:52:54 - INFO  - Selected Bundle for Sony Xperia Z Ultra (C6833). FW release : 14.2.A.0.290. Customization : CE
09/052/2014 04:52:54 - INFO  - Preparing files for flashing
09/052/2014 04:52:55 - INFO  - Please connect your device into flashmode.
09/052/2014 04:52:57 - INFO  - Device connected in flash mode
09/052/2014 04:52:58 - INFO  - Opening device for R/W
09/052/2014 04:52:58 - INFO  - Reading device information
09/052/2014 04:52:58 - INFO  - Phone ready for flashmode operations.
09/052/2014 04:52:58 - INFO  - Current device : C6833 - EP7331CHA8 - 1276-2235_R1B - 1274-7565_14.2.A.0.290 - EURO-LTE_14.2.A.0.290
09/052/2014 04:52:58 - INFO  - Start Flashing
09/052/2014 04:52:58 - INFO  - Processing loader.sin
09/052/2014 04:52:58 - INFO  -     Checking header
09/052/2014 04:52:58 - INFO  -     Flashing data
09/052/2014 04:52:58 - INFO  - Processing of loader.sin finished.
09/052/2014 04:52:58 - INFO  - Ending flash session
09/052/2014 04:52:58 - ERROR - Read error :31 : A device attached to the system is not functioning. 
09/052/2014 04:52:58 - ERROR - Error flashing. Aborted
09/052/2014 04:52:59 - INFO  - Device disconnected

damn sony @#$^&*#^$#*

Finally, remove the battery cover and succeed resurrect my xperia z ultra, thank for @[NUT] for aiding all this while

trick
1.remove battery cover
2.remove the battery ribbon/socket or whatever u all the connection point for 8mins
3.charge the battery for 20 mins with brigther red led
4.flash kernel .290 (CE) then
5..charge the battery for1 hrs 20 mins to 50% orange led
6.flash 14.4.A.0.108 ( http://forum.xda-developers.com/showthread.php?t=2798690 ) with full wipe
7.voila
8.onto the bed and sleep for couple of hours after all this while

my xzu gets back to life after 8 days and 5 hours. have been reading and flashing more than 72 hours in total

 

[[NUT]]

@mR.[hyDe] glad you got it fixed, happy to have been of help :good:

 

[mR.[hyDe]]

@mR.[hyDe] glad you got it fixed, happy to have been of help :good:

But I still have a lot of question regarding the process , I will ask one by one when I finish my exam ?

 

[mR.[hyDe]]

@mR.[hyDe] glad you got it fixed, happy to have been of help :good:

After around 30using my xzu its softbrick again, same like first time , sudden shut down while im using , then i boot up , work fine for few mins and **** down again with 3 vibrations
>power on , no led three vibration
>no hard reset
>plug in to pc will be red green led

 

[[NUT]]

After around 30using my xzu its softbrick again, same like first time , sudden shut down while im using , then i boot up , work fine for few mins and **** down again with 3 vibrations
>power on , no led three vibration
>no hard reset
>plug in to pc will be red green led

Well... sounds to me it might be wise to replace your battery then... That's not normal behavior in any way, shape or form... I think your endless attempts to resurrect your device before opening it up damaged the battery...

 

[mR.[hyDe]]

Well... sounds to me it might be wise to replace your battery then... That's not normal behavior in any way, shape or form... I think your endless attempts to resurrect your device before opening it up damaged the battery...

yea , i guess so, will leave it first until i finish my exam then repair it by myself

 

[lostseraph123]

Stuck at the sony logo

i got this newly bought xperia zl and while trying to root it. using this program ROOTGENIUS, it just restart and stuck at the sony logo and always restarting. Please help me.. i dont know what to do.

i thnk i brick it.. dont know if soft or hard brick.

because it is new.. it doenst have custom recovery or unlocked bootloader.
please help me.
Sorry of my english

 

[fofo00o]

battery problem ??

in my XZ i flashed a kernal and i tried to decrease cpu volt
after that my phone got crashes every 10 minutes even when i restore everything and use the official rom with the official kernel

so now what should i do to fix this problem ? is it a hardware or software problem

update :

the phone is stable if i set max cpu to 1026mhz