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phone reboot by itself!!

I got mine from uk handtec and been use four days without any problem
but today it reboot two times alreday without any touch.
did anyone have that kind of iusse any suggestion?
I haven't root my phone and I updated to 534 firmware

paullu said:
I got mine from uk handtec and been use four days without any problem
but today it reboot two times alreday without any touch.
did anyone have that kind of iusse any suggestion?
I haven't root my phone and I updated to 534 firmware
Click to expand...
Click to collapse
you might need to do a factory reset then update the firmware again, I think the update to 534 didn't go too well... also happened to my samsung phones preiously after updating to latest firmware...

Morlock O said:
you might need to do a factory reset then update the firmware again, I think the update to 534 didn't go too well... also happened to my samsung phones preiously after updating to latest firmware...
Click to expand...
Click to collapse
I was just about to post about the same issue. Twice now when driving I have noticed that the phone suddenly reboots. It's sitting in a passive car holder (no power, NFC, bluetooth etc). But it's just in my line of sight so I quickly notice when it suddenly boots.
I have no idea if it does this the rest of the day or not as well. But this is not a good sign.

if resetting to factory setting then re-updating the firmware does not work, try to re-flash the stock firmware using FTF files...
http://forum.xda-developers.com/showthread.php?t=2459365
http://forum.xda-developers.com/showthread.php?t=2464389
this usually happens when there is some conflict with the firmware.. very common issue with all android phones...

I'd flash it with flashtool.

I did a "reflash" of the latest firmware using the PC companion software that came with the phone. Will report back in it helped or not.

I did a factory reset.hope will solve it

dead NFC and rear led on all roms

hey,
I had 4.2.2 in my 5503. Couple days ago I decided to upgrade it to 4.3 using flashtool, because there wasn't official 4.3 for my region yet . After that, I noticed my led and NFC are dead. Led isn't working (no flash when making pics, not working as a flashight). NFC unchecks just after when I click on it. Tried: downgrade, delete/rename usf (like in xperia z), many others official roms. tried fix and upgrade by SUS and SPCC. No changes. Also tried CM11 4.4, but still led is dead, NFC option can't be even marked. Now I'm on rooted 4.3. Any ideas how to bring them back? And no, backup doesn't exist

waw that's not cool.. do you erase the whole system when you flash?
Made in ZR

Yes. I thought it is better to have clean instal. Habit of installing roms on old phone. Everything else seems to work fine. I'm out of ideas.

hmm it's weird dude. well I suggest :
ensure that you bootloader is locked
do a fresh full flash with all wipes
do a reset in settings > backup & reset
then go into service menu > service tests > flash led
for the service menu, at the stock dialer, type : *#*#7378423#*#*
if it still doesn't work after this, I'm afraid this is hardware related.

Ilko said:
hmm it's weird dude. well I suggest :
ensure that you bootloader is locked
do a fresh full flash with all wipes
do a reset in settings > backup & reset
then go into service menu > service tests > flash led
for the service menu, at the stock dialer, type : *#*#7378423#*#*
if it still doesn't work after this, I'm afraid this is hardware related.
Click to expand...
Click to collapse
Did that many times. To have clear conscience I connected phone to another usb. formated, flashed .67 with wipes. After reset, in service menu led is still dead. connected to pc, updated with SUS to .569. and same story. I'm sure they were working before 1st flash and upgrade. If this is hardware problem, should NFC unchecks itself just after I click on it?
Ehh I suppose, I have to deal with it. There is no cure for my zr
ps. in /system/app/ I can see ncf.apk & nfc.odex only. That's it, right?

well I don't know mate, did you ever unlocked the BL? It may be drm related also
Made in ZR

NFC firmware needs update?
I got my ZR a few weeks ago, it came with 4.1.2 on it.
Straight away I hooked it up to PC companion and it updated to 4.2.2, during the first reboot I got a message on the screen for quite a while: "Updating NFC firmware"
I then had problems and thought it was due to 4.2.2, I downloaded & flashed a 4.1.2 ROM, once again, on the first reboot I got the "Updating NFC firmware" message.
Then I realized that the problems weren't due to 4.1.2 and flashed 4.2.2 again, once again got the "Updating NFC firmware" message.
This might not be much use to you but it seems to me that the NFC firmware needs to match the version of Android you're running.
Sorry, no idea how to update it manually, just thought it's something you might like to investigate.
Maybe start here ....
http://forum.xda-developers.com/showthread.php?t=2284166

Ilko, yes. BL was unlocked. I had thought, drm can be involved with it. If yes, I'm pretty ***. I don't see any other explanation. many official roms. repairs by sus and companion. checked in buildprop editor, and everything looks ok.
alan573819, when I bought mine it was 4.1.2 also. Couple weeks later upgrated it to 4.2.2. but I don't remember that NFC dialog. I just don't remember, so it doesn't mean I never had it it was long time ago. I know that topic. Believe me, I know them all I'm silent reader xda since se k800i. Always found answers without asking. Until now.. I had to register, because no1 have same problem. with z, there is problem only with NFC (no1 complains about led), and they can fix it by deleting usf. It doesn't work for me. anyway, on 4.2.2 I had no problems with NFC or led. everything worked perfect until I decided to upgrade it to 4.3 with flashtool.
my phone was unlocked, rooted, had .310, .67, .569 for at least 3 different regions, had CM11 4.4, was repaired and upgraded by SUS and Companion. No changes. It just has to have something with drm, because I don't believe that hardware was broken during update. drm can explain it. but.. that's weird if NFC and especially led has something to do with it.

okay, then did your ever relocked it? backed up TA? restored it?
Made in ZR

yes, I have relocked zr.
Like I said before, I didn't make any backups. Didn't expect any problems so I just wiped and flashed my phone. On the other hand- who expects them? . I can risk with my own phone. If I do something for others, I always do backups, double checks etc.

Xperia T - restarts after flashing new firmware

Hey.
This is my first thread so welcome all. If this issue was fixed or if there is similar thread please close it down.
I have Xperia T that was branded by Vodafone DE. I updated it once from the standard firmware (I think it was the 4.1.2 android) to 4.3 (9.2.A.0.295), everything was fine, except that on two occasions the screen just could not be forced to turn on. Everything was working, sound, calls etc. I just had to hard reset it to enable the screen. Once when I was receiving call I could not answer it, the screen was jumping, blinking and I could not do anything with it. Hard reset helped again. I thought that those were bugs from the 9.2.A.0.295 but now I'm not so sure.
I downloaded the newest version of flashtool and the UK 9.2.A.1.199 firmware from this site, not branded, not modified. I unlocked the phone using the instructions on the sony site but since i didn't wanted to root the phone I locked it again. I flashed the mentioned UK firmware without problems and then the phone started to randomly reset itself. Usually it is getting hot under the camera and it resets mainly after using facebook or basically internet. It mostly resets when my phone is in the pocked. I tried using pc companion's repair option, used the firmware from Italy, Greece and almost all 9.2.A.1.205 except the Bond release. I think it's not the firmware, I've reverted to the 9.2.A.0.295 to no success. There are from one to six resets a day at random hours. Did someone had this problem? Is it related to the firmware flashing or could be just a coincidence and my xperia is dying from motherboard\battery failure? I replaced my sim card with new one. It also happens with or without the sd card.

Hi, the most common restart's are:
a) Sim card ( you change that)
b) Software ( you change that)
c) Very rare SD card ( try to do that) get the SD out end boot the phone. Edit .. you all ready do that.
d) End must common is the Battery ( first try de c) version ,then if fail , you need to buy a new battery end try.
e) motherboard (well new phone? )
This not exactly the order, but from i have read , point d , b ,a , are the order .
So Good Luck.:good:

I think it could be the battery or the board, since it happens on all firmwares. The thing I would like to know is that using flashtool for an example could somehow damage the phone or the battery? I never found any info on this.

Nekris said:
I think it could be the battery or the board, since it happens on all firmwares. The thing I would like to know is that using flashtool for an example could somehow damage the phone or the battery? I never found any info on this.
Click to expand...
Click to collapse
I have heard that upgrading to 4.3 could actually damage the battery. So yes, it is possible.
I don't know the reason tho
Sent from my Xperia V using Tapatalk.

[Q] my phone can't fully startup even with new rom

hello
one week ago my xperia ZR phone signal suddenly gone.
i get back it for repair. but after some days they couldn't repair it, now my phone have a new problem, it boot to lock screen page then show a message "system not responding" and it will be freeze then restart.
i flash official 4.3 Rom via flash tools but not solved
what can i do?

l0000l said:
hello
one week ago my xperia ZR phone signal suddenly gone.
i get back it for repair. but after some days they couldn't repair it, now my phone have a new problem, it boot to lock screen page then show a message "system not responding" and it will be freeze then restart.
i flash official 4.3 Rom via flash tools but not solved
what can i do?
Click to expand...
Click to collapse
try to flash 4.2 ftf

Ben Ling said:
try to flash 4.2 ftf
Click to expand...
Click to collapse
problem solved with stock 4.1.2 ftf
now my phone is boot-up but can not detect simcard (no signal).
how can i know it's hardware problem or not ?

l0000l said:
problem solved with stock 4.1.2 ftf
now my phone is boot-up but can not detect simcard (no signal).
how can i know it's hardware problem or not ?
Click to expand...
Click to collapse
then try to flash the 4.3 ftf

Ben Ling said:
then try to flash the 4.3 ftf
Click to expand...
Click to collapse
tried, but after 4.3 phone will freez at first page and at top show no signal.
back to 4.1.2
any other ways ?

Random reboots

Hi. I hate this phone.
After three months since I got it, one day it turned off by itself and never turned on again. I sent it to customer care in the store where it came from, and they changed the battery. The moment I got home, the phone had the same problem. So I tried Sony PCC to repair it. It turned on, I installed some apps and suddendly it turned off again. I suspected it was because I deactivated bravia engine, but I'm not so sure that's the problem. Anyway, I decided to downgrade to Android 4.1 version .254 with root. Now the phone seems to be working. But sometimes it just reboots by itself. It happened once when I was scrolling Facebook, and twice when I was using Chrome. It just reboots and restars like nothing happened.
Is this a Ram problem? I can't put the latest firmware because the phone doesn't work AT ALL with it. What can I do?

Hi. Try to flash 254 fw with flashtool. It could help.

Flash the latest FTF via Flashtool

I have quite similar issue on my Xperia SP (random reboots). I have latest official rom installed via PCC.
Try switching off Stamina Mode and see if it keeps happening. It seems to work in my case.