Database Develop

Phone keeps shutting down

Today my 4X encountered a strange problem: It shut down itself (I thought the battery was empty and charged it), and after restarting it just shuts down immediately. It shows the lockscreen saying "no SIM" and then shuts down. Anyone know a solution to fix this? I suppose a factory reset might do it, but I don't have a backup now and would like to keep my data.

muellersmattes said:
Today my 4X encountered a strange problem: It shut down itself (I thought the battery was empty and charged it), and after restarting it just shuts down immediately. It shows the lockscreen saying "no SIM" and then shuts down. Anyone know a solution to fix this? I suppose a factory reset might do it, but I don't have a backup now and would like to keep my data.
Click to expand...
Click to collapse
If it is the SIM then try a different SIM, or put a folded piece of paper between the holder and the SIM - I always do that with phones just to make sure it keeps good contact at all times.
Other than that, no real idea mate - sorry

I think it should also work without a SIM. But as said, it just shows the lockscreen for ~2 seconds and then shuts down. I have tried without a sim, it's the same. I'll try with a different one, but I suppose that won't help much. I think i'll also try a kdz reflash, but i'll have to set up my father's PC to do so. Just thought maybe someone knows a quick solution.

Alright, i've just done a kdz reflash - same situation. Is there a way to adb pull the /data/data from any of the other modes (recovery, Emergency etc.?)

muellersmattes said:
Alright, i've just done a kdz reflash - same situation. Is there a way to adb pull the /data/data from any of the other modes (recovery, Emergency etc.?)
Click to expand...
Click to collapse
Weird... Reflash use to replace all files and stock settings unless you have some app avoiding them to run... Reflash don't delete installed apps most part of the time. If you have frozen apps they'll remain frozen. Did you factory reset before reflash?
Sent from my LG-P880 using xda app-developers app

RuedasLocas said:
Weird... Reflash use to replace all files and stock settings unless you have some app avoiding them to run... Reflash don't delete installed apps most part of the time. If you have frozen apps they'll remain frozen. Did you factory reset before reflash?
Sent from my LG-P880 using xda app-developers app
Click to expand...
Click to collapse
No, as said i wanted to try everything before doing a factory reset (don't have a recent backup because Ubuntu won't recognize the MTP mode properly). I have restarted the phone many times before without that strange behaviour and didn't freeze anything since then. I just can't tell where the problem comes from. BTW, the SIM is recognised now (after the reflash), but still shutting down.

muellersmattes said:
No, as said i wanted to try everything before doing a factory reset (don't have a recent backup because Ubuntu won't recognize the MTP mode properly). I have restarted the phone many times before without that strange behaviour and didn't freeze anything since then. I just can't tell where the problem comes from. BTW, the SIM is recognised now (after the reflash), but still shutting down.
Click to expand...
Click to collapse
You notice some over heat, you try to use it without SD card, it keeps rebooting when charger is connected?...
Cause appart of hardware malfunction, I can't see any other reason... of course we don't know if the system file is corrupted or not...
If the phone is ON time enough, you can copy the data files/ folders to your SD card, after save them all you can factory reset...
Wait for better help cause I have no idea... sorry

RuedasLocas said:
You notice some over heat, you try to use it without SD card, it keeps rebooting when charger is connected?...
Cause appart of hardware malfunction, I can't see any other reason... of course we don't know if the system file is corrupted or not...
If the phone is ON time enough, you can copy the data files/ folders to your SD card, after save them all you can factory reset...
Wait for better help cause I have no idea... sorry
Click to expand...
Click to collapse
It's not because of heat, the phone is really cool. It just stays on for a second or so, just enough to see the lockscreen or the "Enter PIN" screen and then it shuts down. It's like the battery was empty, but it's charged. It even shows the charged battery symbol. Guess I'll have to do a factory reset and lose my data. As root is gone, I also can't boot to the bootstrap recovery (with this method) to backup there. Should have done that before doing a reflash...

muellersmattes said:
It's not because of heat, the phone is really cool. It just stays on for a second or so, just enough to see the lockscreen or the "Enter PIN" screen and then it shuts down. It's like the battery was empty, but it's charged. It even shows the charged battery symbol. Guess I'll have to do a factory reset and lose my data. As root is gone, I also can't boot to the bootstrap recovery (with this method) to backup there. Should have done that before doing a reflash...
Click to expand...
Click to collapse
You can try to downgrade before factory reset... some apps won't work but, maybe the phone just don't turn OFF and you'll be able to save your data.

So downgrading didn't work either. I'll use the LG Support Tool to upgrade and factory reset now (with data loss). That should hopefully fix it.

Well, the LG Support tool also didn't fix it. Data is lost now, so I can freely do whatever I want
I've tried to get into the "low-level mode" (http://forum.xda-developers.com/showpost.php?p=35524491&postcount=11), but no success. Can someone point me into the right direction and on how to press those buttons? I've tried several combinations, but they all didn't work out - either the battery symbol appeared or the phone booted to recovery or to the "do not touch cable notice" mode.
As far as I understand I should do the following steps:
1) Remove the battery and USB cable
2) Insert the battery and plug in the cable. The phone vibrates once, then shows the LG logo, then shows a battery symbol and then turns off the screen.
3) Press Vol+ and power and hold it. The battery logo shows again. There is a sound indicating that some device is connected to Windows. The screen turns off and there is a sound indicating that the device is disconnected from Windows. Let go off the buttons.
4) Press the buttons again until there is a sound indicating that a device is connected to Windows. Let go off the buttons. The screen should remain off.
Is this correct? What am I doing wrong? Do I have to wait at some point for some action? As said, all I ever got was the "battery symbol" again (for a few seconds).

muellersmattes said:
Well, the LG Support tool also didn't fix it. Data is lost now, so I can freely do whatever I want
I've tried to get into the "low-level mode" (http://forum.xda-developers.com/showpost.php?p=35524491&postcount=11), but no success. Can someone point me into the right direction and on how to press those buttons? I've tried several combinations, but they all didn't work out - either the battery symbol appeared or the phone booted to recovery or to the "do not touch cable notice" mode.
As far as I understand I should do the following steps:
1) Remove the battery and USB cable
2) Insert the battery and plug in the cable. The phone vibrates once, then shows the LG logo, then shows a battery symbol and then turns off the screen.
3) Press Vol+ and power and hold it. The battery logo shows again. There is a sound indicating that some device is connected to Windows. The screen turns off and there is a sound indicating that the device is disconnected from Windows. Let go off the buttons.
4) Press the buttons again until there is a sound indicating that a device is connected to Windows. Let go off the buttons. The screen should remain off.
Is this correct? What am I doing wrong? Do I have to wait at some point for some action? As said, all I ever got was the "battery symbol" again (for a few seconds).
Click to expand...
Click to collapse
Once that data is gone, just reflash the phone.
My advice, like always is, downgrade, factory reset, upgrade , root, factory reset.
hope you don't tell me that you have problems with flash method...

I have tried that. Flashed v10a, wiped data in recovery, upgraded to v10h via LG Support Tool. Still shutting down. I thought the emergency recovery might fix it but I cant get the emergency mode to work. I'll call the LG support tomorrow and hope they'll bring me a new phone.
Gesendet von meinem ASUS Transformer Pad TF300TG mit Tapatalk 2

muellersmattes said:
I have tried that. Flashed v10a, wiped data in recovery, upgraded to v10h via LG Support Tool. Still shutting down. I thought the emergency recovery might fix it but I cant get the emergency mode to work. I'll call the LG support tomorrow and hope they'll bring me a new phone.
Gesendet von meinem ASUS Transformer Pad TF300TG mit Tapatalk 2
Click to expand...
Click to collapse
If when you're flashing, you use "web upgrade" instead of normal upgrade, it will upgrade with LG Tool, official firmware, what it means that is the same than the emergency recovery that you're trying to use.
The difference is that you don't need to use IMEI. The detection is automatic.

RuedasLocas said:
If when you're flashing, you use "web upgrade" instead of normal upgrade, it will upgrade with LG Tool, official firmware, what it means that is the same than the emergency recovery that you're trying to use.
The difference is that you don't need to use IMEI. The detection is automatic.
Click to expand...
Click to collapse
Thanks, I thought the Emergency Recovery was still different. So no chance to fix this now. LG's support won't work on Christmas, so three more days stuck with it.

I got the phone back today. Put the battery in, started, and... it shut down. AGAIN. They were supposed to fix that! Anyone near me who has a spare battery for testing? After all that might be faulty.

muellersmattes said:
I got the phone back today. Put the battery in, started, and... it shut down. AGAIN. They were supposed to fix that! Anyone near me who has a spare battery for testing? After all that might be faulty.
Click to expand...
Click to collapse
It goes down when charger is connected?

Yes, it does. And it recognises the battery as full, that's why I don't suppose it's because of that. But one never knows.

mines done it a couple times recently too! just living with it till the update!

Problem solved. A new battery did the trick. But I still don't know why it would shut down with the old one.

(Problem) S5 G900A keeps restarting

Hi guys. This issue just started happening a couple of days ago, it started when I was playing games (phone wasn't hot) then it turned off by itself. My battery was still at 80% so I turned it back on, after it started saying "starting apps" it turned off again and the phone is now constantly rebooting. It doesn't seem to be bricked at all as it sometimes boots to the menu but when i start tapping on an app it shuts off and does the constantly rebooting issue again. It could be a hardware issue which means I'm gonna need to send my phone to the service center for a repair but one thing that makes me think there could be a way of fixing this without paying a technician is, when i boot to download mode, it doesn't do its constant reboot issue. I was even able to flash a firmware via Odin but when the phone started to boot after firmware installation, It did the spontaneously rebooting in the middle of the boot process again. If any of you guys have any idea on how to fix this or if there's even a way to, Please help me. Thanks! Cheers!

junnelle said:
Hi guys. This issue just started happening a couple of days ago, it started when I was playing games (phone wasn't hot) then it turned off by itself. My battery was still at 80% so I turned it back on, after it started saying "starting apps" it turned off again and the phone is now constantly rebooting. It doesn't seem to be bricked at all as it sometimes boots to the menu but when i start tapping on an app it shuts off and does the constantly rebooting issue again. It could be a hardware issue which means I'm gonna need to send my phone to the service center for a repair but one thing that makes me think there could be a way of fixing this without paying a technician is, when i boot to download mode, it doesn't do its constant reboot issue. I was even able to flash a firmware via Odin but when the phone started to boot after firmware installation, It did the spontaneously rebooting in the middle of the boot process again. If any of you guys have any idea on how to fix this or if there's even a way to, Please help me. Thanks! Cheers!
Click to expand...
Click to collapse
Try flashing the experimental firmware from the rooting guide, and if that doesn't work then it is most likely a hardware issue, and I have a strong suspicion that it is.

If you have an external SD card, remove it and see if problems persist. Honestly that sounds like a firmware scrambled.

Note 4 Reboot Problem with Weird Temporary Solution

I'll try to make this short.....
I am using N910T3. Phone was charging in car while using (stop by roadside). Out of sudden it shutdown and went into reboot loop and the phone is extremely hot. I took the battery out for soft reset and try to turn on again. Phone will freeze at different screen (Lock Screen, Home Page, Samsung Logo, Powered by Android) and give two separate vibration before reboot.
I thought it is battery problem so I bought a new battery to try, but still the same problem. So I went on to backup all file before I perform hard reset. While doing that, I find out the phone can be use for longer before reboot if it was stay off for a long time. So I have this crazy idea: put it in a fridge. Surprisingly it works! The phone will not reboot anymore and I can manage to backup all file before doing anything else. Also, the phone will not charge if you plug in right after a few reboot.
Then, along with the fridge method, I perform factory reset through normal android setting. Now it will just stuck at powered by android screen while in reboot loop. I then try to flash with Odin, multiple times. Flash by Odin is complete, phone restart, then it freeze and reboot, at different screen (Installing system update, Erasing, powered by android).
Out of frustration I try with the fridge method to flash, and IT WORKS AGAIN!!!. The phone can now boot to welcome screen where you first setup your phone. However, it will then freeze again and reboot while doing so.
There was only this one time, where I left the phone off for a day after flash with a previous stock ROM, turn it on and skip as much setup as I can, finally reach the homepage screen, then will stay on without any reboot issue. I thought I finally fix it. I then power off the phone, put in my Sim Card and SD Card, power it on, then again, reboot issue appear.
I tried flash with latest stock ROM, previous stock ROM (one updates away), flash any stock ROM with pit file. I sometimes will get error code on device after flash (can't remember the exact error). I also cannot boot into recovery mode without flashing a twrp. Sometimes if success, I will get straight to Lock Screen without going through the phone welcome setup process. But again, none of these I tried can solve the reboot loop.
I may went too far and mix up all steps to the phone. Does anyone have any idea how to fix this? Or is my phone, as I believe, has a faulty motherboard that cause the reboot loop? Thanks in advance for reading through my problem!

Hello there, I had a Tmo Note 4 which I loved it until the end, it's a hardware problem and there is no fix for it unless you replace the board, by the time you buy the board and what you need to pay for labor you're going to expend a few hundred dollars, I also tried the freezer method but it finally the phone gave up, it does not turn on anymore. That was my experience. Good luck bud.

oscarmaldonado said:
Hello there, I had a Tmo Note 4 which I loved it until the end, it's a hardware problem and there is no fix for it unless you replace the board, by the time you buy the board and what you need to pay for labor you're going to expend a few hundred dollars, I also tried the freezer method but it finally the phone gave up, it does not turn on anymore. That was my experience. Good luck bud.
Click to expand...
Click to collapse
Seems like that's the case I guess.....But if anyone has any suggestion please do tell so I can give it a shot.

jackgan said:
Seems like that's the case I guess.....But if anyone has any suggestion please do tell so I can give it a shot.
Click to expand...
Click to collapse
Try a firmware flash before newsest. Then take the ota

anyone know if a 910t3 mother board will fit in a 910t frame? Asking cuz I wanna switch them out.

Replacement phone bootlooping again. It seems to be a software or firmware issue.

This is a continuation of a previous thread: https://forum.xda-developers.com/xperia-xz2/help/phone-stuck-bootloop-tried-reflashing-t3835480
Before I returned my Xperia, I tried setting it up as a new phone rather than from a backup of my Verizon Samsung Galaxy S5 via Google cloud backups. The phone stopped crashing, but I was pretty much ready to return the device.
I returned my old Xperia XZ2 and got an identical replacement. The new phone has a different serial number and is an older revision (not sure if it's a bad thing). Firing the phone up, I tried logging in to my Google account and restored everything from backup minus apps. After I finished the initial setup, I popped the sim tray out and stuck it back in. Phone started bootlooping again until I reimaged it with Xperia Companion. Second try, I set it up identically to the first try without restoring from backup. Logged into same accounts and downloaded the same apps with same settings. This time, it doesn't suddenly lockup up and bootloop when I pop out the sim card nor when I plug or unplug a USB device or cable into the phone. This leads me to believe that it's a software issue when I log into my Google account and restore from backup. Out of sheer curiosity, I want to see if it's possible to pinpoint if it's Google's fault of Sony's fault, then submit some sort of bug report to get this issue fixed. I really can't give this phone a good review in good conscious because of the possibility of someone experiencing the same issue but without the technical knowledge to fix it.

Have you tried downloading the newest fw from FlashTool and just flash it via there?

FartyParty said:
Have you tried downloading the newest fw from FlashTool and just flash it via there?
Click to expand...
Click to collapse
I currently have the bootloader locked at the moment. However, the Xperia Companion software automatically updated the phone to 51.1.A.11.51 (latest version at this time of writing) when I reimaged the phone. So basically, yes.

Did you try in safe mode?
Also did you try with an other sim card and/or sdcard?

niaboc79 said:
Did you try in safe mode?
Also did you try with an other sim card and/or sdcard?
Click to expand...
Click to collapse
Safe mode would still have the same boot looping issue.
I haven't tried a different sim card, but a different SD card yields the same results. Actually, just popping the card tray out of the phone is just enough to trigger the bootloop issue.

patx35 said:
Safe mode would still have the same boot looping issue.
I haven't tried a different sim card, but a different SD card yields the same results. Actually, just popping the card tray out of the phone is just enough to trigger the bootloop issue.
Click to expand...
Click to collapse
No if the bootloop is related to an app safe mode would help.
I think that the problem comes from something you did, twice the same issue isn't normal.
Check the sim card. Alos the sim tray, phone is supposed to reboot when you remove it, it seems that the captor or button or software think that you are continually removing the sim tray.

niaboc79 said:
No if the bootloop is related to an app safe mode would help.
I think that the problem comes from something you did, twice the same issue isn't normal.
Check the sim card. Alos the sim tray, phone is supposed to reboot when you remove it, it seems that the captor or button or software think that you are continually removing the sim tray.
Click to expand...
Click to collapse
I think you misunderstood what I meant. When I do something that triggers the bootloop, such as either pulling the SIM tray out or unplugging the USB cable from the phone, the phone would hardlock for several seconds, then suddenly reboot without warning. The phone would then go into an infinite loop of "successfully" booting up into the lock screen, suddenly hardlocks a few seconds after booting (not enough time to even unlock the device), then suddenly shut off, then turn itself back on. Pulling the USB cable just triggers the bootloop. Pulling the SIM tray out would momententarly state that the SIM card is removed, then the spinning animation sudden freezes and triggers a bootloop. When I booted the phone into safe mode, it would still have the same bootlooping issue.
Also, I doubt that it's the SIM tray acting up; especially since they work fine if I don't restore from my Google account. I'm already using my phone for several days and it haven't started acting up again.

patx35 said:
I think you misunderstood what I meant. When I do something that triggers the bootloop, such as either pulling the SIM tray out or unplugging the USB cable from the phone, the phone would hardlock for several seconds, then suddenly reboot without warning. The phone would then go into an infinite loop of "successfully" booting up into the lock screen, suddenly hardlocks a few seconds after booting (not enough time to even unlock the device), then suddenly shut off, then turn itself back on. Pulling the USB cable just triggers the bootloop. Pulling the SIM tray out would momententarly state that the SIM card is removed, then the spinning animation sudden freezes and triggers a bootloop. When I booted the phone into safe mode, it would still have the same bootlooping issue.
Also, I doubt that it's the SIM tray acting up; especially since they work fine if I don't restore from my Google account. I'm already using my phone for several days and it haven't started acting up again.
Click to expand...
Click to collapse
The sim card restart has every XZ2.
But it should not bootloop.

Freezes and restart... Died. What is the problem?

Hi guys since yesterday I have problems with my phone
the phone suddenly freezes over without being able to interact.
it restarts on its own but without ever starting the operating system in fact it shuts down and does not turn on again as if the phone had died.
the really strange thing is that the phone was fine Then suddenly he started making this mess.
Yesterday after so many hours of problems I managed to start the phone and now it works well but I am afraid that the situation will repeat itself.
the phone has the bootloader unlocked has root permissions, I followed the guides on this site.
But I have had this phone for two months now and these problems never occurred.
where can i start to understand what the problem is?

Mine suddently become all white, with the interface cut in half and moved up. i could do nothing. nor reboot nor shutdown.
after some minutes it turned back normal. i hope its color os bug and realme will fix it

It appears to be a firmware problem. We hope well.

Today did not give problems. This behavior is really strange, what can I install to understand the root of the problem?

I noticed that if the phone never goes into deep sleep mode the problem does not occur.
Now I am registering the log and as soon as the problem occurs again I go into detail to find out the real reason.
I'm trying to create an automatic script that is launched on the boot that practically never makes the phone sleep.

i'm really desperate the phone started to reboot itself.
I would like to try using a system log recorder but I realized that when I restart the phone these logs are not saved so it is impossible for me to verify the reason.
Can any of you help me out?
the phone freezes and then restarts.

Did you achieve any solution ?

No. I'm disperate.

Why don't you flash stock fw /recovery? Just to make sure it isn't an Hardware problem ?

I try but have this problem
https://forum.xda-developers.com/realme-x2-pro/help/bootloop-realme-x2-pro-rmx1931ex-t4089177

@westenlive
The problem appears only when you use data connection right?
If you try to switch off data and use wifi , you will not notice
The problem is because of the the operator, try another sim provider

Yes, in fact, that could be the problem because a few months ago removing the SIM card the phone did not give more problems
maybe you gave me the solution. I'll try

Ahmed Momtaz said:
@westenlive
The problem appears only when you use data connection right?
If you try to switch off data and use wifi , you will not notice
The problem is because of the the operator, try another sim provider
Click to expand...
Click to collapse
I am now testing the LINEAGE it happened to me this I removed the SIM card and I installed the costum Rom, I made the various customizations and the phone never locked OR restarted.
I inserted the SIM card in the phone worked perfectly, then having messed up with luckypatcher I had to reinstall the Rom.
So I performed the same procedure with the SIM card inserted in the phone and already at the first start it was unstable with reboots.
Currently I have applied for a change of sim card.
As soon as it arrives I will try to remove the sim card Install from scratch The system is to insert the new SIM card only so I can have the mathematical certainty that it is the SIM card
I hope my experience can help someone

This problem seems true, my X2 Pro also faced same issue when enabling cellular data. The phone sometimes loses the signal or the app freezes and perform a phone reboot. X2 Pro is a mid-range flagship phone, and yet this problem should be solved before they start to sell the phone.

Yes this device has many software problems but hardware problems of this kind are not acceptable.
Practically mine has become unusable, as soon as I turn it on after a few minutes of use it start closing the apps by itself.
Then after AN intende use of 30 minutes it start to restart.
This phone is truly incredible
Next time buy ONE PLUS