Samsung S8 randomly restart and will not turn on - Samsung Galaxy S8 Questions and Answers

Since days ago, my s8 has been randomly restarting throughout the day. Yesterday it started going off and will not turn on unless I do force restart (Vol down + Pwr). I have tried restarting in Safe mode, Clearing cache Partition and I even did a total factory reset.
This morning the Iris sensor even stopped working. Please what do I do?

SamsungJB said:
Since days ago, my s8 has been randomly restarting throughout the day. Yesterday it started going off and will not turn on unless I do force restart (Vol down + Pwr). I have tried restarting in Safe mode, Clearing cache Partition and I even did a total factory reset.
This morning the Iris sensor even stopped working. Please what do I do?
Click to expand...
Click to collapse
Try giving your phone an update via odin.

SamsungJB said:
Since days ago, my s8 has been randomly restarting throughout the day. Yesterday it started going off and will not turn on unless I do force restart (Vol down + Pwr). I have tried restarting in Safe mode, Clearing cache Partition and I even did a total factory reset.
This morning the Iris sensor even stopped working. Please what do I do?
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Click to collapse
from my prior experience (have not had this happened to me on this device - yet), but this typically has occurred when the RAM gets overloaded. this can be caused when you have too many applications running at once (background syncing, notifications, etc.).
i'd suggest installing greenify - as that helps hibernate some of those apps that tend to constantly run when you don't need it. also, try going to settings -> device maintenance and pressing the "optimize now" button - that should help clear some of the noise.
good luck.

jco23 said:
from my prior experience (have not had this happened to me on this device - yet), but this typically has occurred when the RAM gets overloaded. this can be caused when you have too many applications running at once (background syncing, notifications, etc.).
i'd suggest installing greenify - as that helps hibernate some of those apps that tend to constantly run when you don't need it. also, try going to settings -> device maintenance and pressing the "optimize now" button - that should help clear some of the noise.
good luck.
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I just tried installing Greenify. I am really not a heavy phone user. Just whatsapp, mails and browsing on chrome 90% of the time. The phone just restarted on its own again now.

SamsungJB said:
I just tried installing Greenify. I am really not a heavy phone user. Just whatsapp, mails and browsing on chrome 90% of the time. The phone just restarted on its own again now.
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are you showing any notifications prior to it rebooting? sometimes the phone will do that if there is a software update.
go to the settings -> system updates -> check for system updates (do this while on WiFi)
if there is a new update, it's probably rebooting.
not sure if your phone is rooted, but if so, then it won't be able to make those updates. if not rooted (which is what i suspect), then it should take.
if no updates, then I would examine which apps are running in the background by going back to the Device Maintenance setting.

SamsungJB said:
Since days ago, my s8 has been randomly restarting throughout the day. Yesterday it started going off and will not turn on unless I do force restart (Vol down + Pwr). I have tried restarting in Safe mode, Clearing cache Partition and I even did a total factory reset.
This morning the Iris sensor even stopped working. Please what do I do?
Click to expand...
Click to collapse
Sad to hear this. Some pointers if it could help you.
- Do you know what is the last operation you did just before this problem started ? Was it an update ?
- Does the restart become less frequent after you wipe the cache ?
- Is it heating up just before the restart happens ?
- Dial *#0*# .. and check for IRIS Scanner and other sensors and see if all is ok.
If you are on warranty, Take it to the service center ASAP.
Regarding Updates, Please do it only via Smart Switch
OR
Take it to the service center and ask them to update it. They should charge you a mere 4$ equivalent if not in warranty

Hi guys,
A very similar problem happened to me. Thursday morning my phone restarted itself and got stuck on the Samsung Galaxy S8 boot screen. Despite holding bixby, volume up and power it won't boot into recovery mode. I can get it into download mode but despite following some guides on here I was unsuccessful at attempting to update/re-flash through Odin. It failed each time.
I'm about resigned to taking it into the Samsung store but wondered if you guys would have any further advice? FRP and OEM lock are on, unfortunately I'm not sure how to turn them off when the phone wont boot.
Kind regards,
Daz

Related

Phone Randomly Keeps Rebooting YMMV fix

This may or may not be related to anybody having the same issues but I'd like to report on a fix for this. This may or may not apply to you so YMMV, but this defenitely stopped my phone from rebooting randomly.
The thing that fixed my phone from auto rebooting by itself randomly is to go into your Play Store option and set Auto Update Apps to 'Update over Wifi only'. I had set it to never update. I can't get into why it happens since I don't know where to check logs but this does work for me. (Menu>Settings>Auto-update apps)
My story: Yesterday my phone reboots by itself every few minutes without even touching it for no reason at all. Phone had about 75% juice. I remember doing the unlock and had no problem with it for the whole day. I was at jury duty, boored and I was messing with options to restrict background data and changed the Play Store update options to Never Auto Update Apps since I switched to Tmobile and I don't have an unlimited data anymore. Afterwards the phone started rebooting by itself at various times during the day. I didn't notice until later on the night where it rebooted itself every few minutes. So I tried out various fixes which didn't work and set Airplane mode stopped the rebooting but wasnt a fix. After awhile I tried to retrace all the stuff I did on my phone during the day and strangely setting the option back to Auto Update Apps to Wifi Only fixed it. After doing that the phone stopped rebooting by itself and I was able to use it all day today.
So basically, see if setting the auto update to wifi only if you had it off will fix this.
Also I realize there are many different fixes other users have reported like the Power Cycling, Airplane mode or Clearing Dalvik and Cache(Which didn't work for me), or even reflashing/reset to factory (I avoided this). None of those worked for me. If those didn't work for you, try this as another option.
Mods: Please move this to Sprint Samsung S4 section. I have no idea why I'm in this section. I'm sure this applies to every S4 though.

Note 4 Randomly Turned Off Won't Turn On Anymore

Hi everyone, after trying everything I could to fix this phone I don't know what to do anymore so I'm here asking for other options.
So the story is, I was just using my phone as I usually would that day and it just randomly turned off and won't turn back on anymore.
(it randomly turned off before a couple of times but it would always turn back on)
- It won't go into recovery mode or any other of the 'modes' (I tried all the different combinations of pressing the keys).
- It's not a battery issue as I've tried my battery on my brother's phone (he has a Note 4 too) and it worked fine and I tried his battery on mine and it wouldn't work.
- I tried the 'drain' method (removing the battery and holding the power button for a minute or more).
- I tried using multiple cables to charge my phone nothing worked.
I didn't drop my phone, wet it, root it or anything and it was working fine the day it happened until it just powered off by itself. When I plug it in my laptop it would make
a sound indicating I've plugged something in but nothing happens. It was version 5.1.1 model SM-N910F.
TLDR; Is there a way to somehow recover the files in the internal phone memory?
This is happening to me as well, also started in February. I'm suspecting a hardware issue. Tried it ALL but rooting. In the past 30 minutes my phone has booted and rebooted itself till it died. If someone can confirm it is a hardware issue. Maybe it's time to unite and get it fixed for free. ~Tamarnouche
Recovering data from a brain dead phone may not be possible, as it probably need some internal component replacement which may erase the data(Mostly). Have u tried connecting it to pc? Better give it to service immediately. Good Luck.
My phone has done exactly the same thing, happened in February too, initially it did the random freeze then started to reboot itself, went back to stock software and full wipe but no improvement; now it will only boot if I leave the battery out for a prolonged period, otherwise it doesn't respond to the power button at all.
I occasionally see MMC Read Fail on boot but not all the time so presumably the internal memory has a bad contact or is failing.
Can it be replaced?
HXOY said:
My phone has done exactly the same thing, happened in February too, initially it did the random freeze then started to reboot itself, went back to stock software and full wipe but no improvement; now it will only boot if I leave the battery out for a prolonged period, otherwise it doesn't respond to the power button at all.
I occasionally see MMC Read Fail on boot but not all the time so presumably the internal memory has a bad contact or is failing.
Can it be replaced?
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Click to collapse
I have the same problem with my Note 3. Only if I keep the battery out for a long (over 24 hours) time I can see the boot logo. So if you find a solution to this kindly don't forget to tag me, will really appreciate it.
I was wondering..
I came across this Forum group since I was looking for boot problems with my SM-N910T3
I hope flashing pit will resolve this..
I recently started to have some low level issue and was hoping it was partition/boot related and not hardware.
Randomly phone boot directly into Download mode with error;
ddi: mmc_read failed
Often I have to pull battery and hold down /power / home for 10 sec to boot up again.
Thanks

Random reboots even after factory reset....

Hello,
I have my Moto X Style for a little less than one year. Had no problems with it at all, enjoyed it a lot, until about 3 weeks ago. It then started to randomly reboot, 3 or 4 times a day. I searched on Google and saw many people had that issue. Tried several of the "solutions" I found, uninstalled some apps I thought could be the cause, with no success.
2 days ago, I decided to do a factory reset. Looked like it worked, for one day. Yesterday, it did reboot once again, only one time though. And now, it just rebooted again a few seconds ago...
What can I do now? The dull thing is that every time it reboots, I lose the Bluetooth association with my devices and have to reassociate them, like the sound system in my car, and it sucks to enter the 0000 code and then having to add the player to the "trusted devices" and all....
Phone is not rooted and running system (Android 6.0 with Dec. 1st security) . Build #MPHS24.49-18-16.
Thanks for any input.
metaleloi666 said:
Hello,
I have my Moto X Style for a little less than one year. Had no problems with it at all, enjoyed it a lot, until about 3 weeks ago. It then started to randomly reboot, 3 or 4 times a day. I searched on Google and saw many people had that issue. Tried several of the "solutions" I found, uninstalled some apps I thought could be the cause, with no success.
2 days ago, I decided to do a factory reset. Looked like it worked, for one day. Yesterday, it did reboot once again, only one time though. And now, it just rebooted again a few seconds ago...
What can I do now? The dull thing is that every time it reboots, I lose the Bluetooth association with my devices and have to reassociate them, like the sound system in my car, and it sucks to enter the 0000 code and then having to add the player to the "trusted devices" and all....
Phone is not rooted and running system (Android 6.0 with Dec. 1st security) . Build #MPHS24.49-18-16.
Thanks for any input.
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Click to collapse
Does it do it Safe Mode?
acejavelin said:
Does it do it Safe Mode?
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Click to collapse
Didn't try on safe mode? THis means the phone would be on, but without any apps working? Or only system apps?
metaleloi666 said:
Didn't try on safe mode? THis means the phone would be on, but without any apps working? Or only system apps?
Click to expand...
Click to collapse
Only the core system apps, no other services are started... To access Safe Mode, press and hold power like you are going to shut off the phone, then when the Power Off message shows up, long press it until it says something about Restart in Safe Mode and select it. The next reboot will be in safe mode. To leave Safe Mode, just power off and restart again normally.
My guess is there is an app conflict somewhere... without a logcat of a random reboot it would be impossible to tell though.
acejavelin said:
Only the core system apps, no other services are started... To access Safe Mode, press and hold power like you are going to shut off the phone, then when the Power Off message shows up, long press it until it says something about Restart in Safe Mode and select it. The next reboot will be in safe mode. To leave Safe Mode, just power off and restart again normally.
My guess is there is an app conflict somewhere... without a logcat of a random reboot it would be impossible to tell though.
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Click to collapse
Thing is, it started to do the random reboot thing even if I didn't install any new apps in a while. So, why would some app that didn't cause reboots before would start to cause some suddenly?
metaleloi666 said:
Thing is, it started to do the random reboot thing even if I didn't install any new apps in a while. So, why would some app that didn't cause reboots before would start to cause some suddenly?
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Click to collapse
I don't know, an update perhaps... But your only other option is to contact Motorola and send it in for repair, it is usually easier to eliminate everything on your end first.
acejavelin said:
I don't know, an update perhaps... But your only other option is to contact Motorola and send it in for repair, it is usually easier to eliminate everything on your end first.
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Click to collapse
I'm from Canada, so can't use Lenovo US. Bought the phone from Expansys, with a 18-month total warranty, but I know they shut down their US office. They're supposed to still honor warranties though...
But still there must be a way to make the damn phone work without shipping it back... Would root and a custom OS be an option?
metaleloi666 said:
I'm from Canada, so can't use Lenovo US. Bought the phone from Expansys, with a 18-month total warranty, but I know they shut down their US office. They're supposed to still honor warranties though...
But still there must be a way to make the damn phone work without shipping it back... Would root and a custom OS be an option?
Click to expand...
Click to collapse
It's always an option, but stock is generally more stable than any custom ROM.
Without knowing the cause, I can't say for sure.
Try the Safe Mode thing first... it wouldn't be first time an app update caused a device to reboot.

Phone UI freezing - forced to manually reboot

I'm having an issue where every couple of hours my Galaxy S8+ freezes. It gets so bad sometimes to the point where the UI is totally frozen and I cant do anything except for a force shutdown via the power + volume down button combination.
I cant put a finger on what app might be causing it but ive already tried running in safe mode and still observed the issue.
I have also tried clearing cache from the recovery menu and i still experience the issue.
Hope someone finds a solution! I cant even use my phone as a test device for work anymore because of this and every couple of hours my phone locks up entirely and I am forced to restart it.
ka05th30ry said:
I'm having an issue where every couple of hours my Galaxy S8+ freezes. It gets so bad sometimes to the point where the UI is totally frozen and I cant do anything except for a force shutdown via the power + volume down button combination.
I cant put a finger on what app might be causing it but ive already tried running in safe mode and still observed the issue.
I have also tried clearing cache from the recovery menu and i still experience the issue.
Hope someone finds a solution! I cant even use my phone as a test device for work anymore because of this and every couple of hours my phone locks up entirely and I am forced to restart it.
Click to expand...
Click to collapse
You can uninstall some apps if you like and see if it changes anything. But if you believe, that you have tried most options, then do Samsung back up and then try factory reset and see if it corrects issue. Otherwise you may need to contact Samsung for help as it maybe a hardware issue as well.

Trusty Note 4 Booting Issue!!

Hey guys, I have had my Note 4 for about 3 years now and it has never done me wrong. However, things have taken a turn for the worse... I started noticing a few days ago that it was slowing down on me, I mean, really slowing down. Big lag times when it comes to swiping to open the screen, or changing between apps, and the occasional self-shut down when the battery got down to about 15-20%. I had been putting off doing a self-update for a while, and when I finally had time to do one tonight, in hopes of cleaning it up, it is now lying on its death bed
I do not think the update ever finished (my phone is not rooted) but I was desperate enough to even do a factory reset and that has not fixed the issue.
Here are the symptoms:
As I go to boot the phone, I get past the Samsung Note logo and it looks like it is about to load properly, but then I get a popup that says "Unfortunately, the process com.android.phone has stopped" I hit ok and it keeps popping up again. I can't bypass it.. Then after I get passed that for a split second, another popup comes up that says "unfortunately system UI has stopped" It prevents me from getting to the home screen, in fact the screen behind it is black.
I have tried the following:
Clearing the cache partition from the recovery screen
I have done numerous hard restarts
I have gone through with a factory restart
That is where I have left off, and lost most hope, was with the factory restart. Now when I turn it on, I get past the logos and I can see in the background the page you would get as if it was a brand new phone (it says "Welcome! Preparing you device for first time use.." etc. But I can't do anything about it because I am still getting the same two popups that prevent me from doing absolutely everything!!!)
I have read about this happening and people seem to be able to fix this by accessing certain app setting and either resetting them, or clearing their cache. However, that is not an option for me because I can't get that far. I think something must have went wrong during the update...
Please help with any advice you can think of. I have been putting off rooting this phone pretty much because I was afraid of royally f****** it up, but at this point I am willing to try anything.
Thanks,
Eric
Hey guys, does anyone have any suggestions for my issue?? I am about to go out and buy a new phone, I have no idea what I can do to fix this. I have rooted it using Odin, but the popups are still occurring. I can't get the popups to stop, and they are preventing me from doing absolutely everything.
Is there anyway I can get it to go back to complete scratch? Again, I have done a factory reset, cleared the cache, rooted using Odin. I have done everything I can think of/what I have read I can do. I am willing to try anything at this point.
UPDATE: At this point my phone is on, and the only error message/popup I am getting is "Unfortunately, System UI has stopped." Behind that popup is a blank, black screen. The only option I have is to click ok, and the screen remains black.
Temporary solution that might work- Try logging in safe mode: Switch off the phone. Power it on and as soon as Samsung logo appears, release the power button and press and hold the volume down button. Release button when you see Safe Mode on the lower left corner of the screen. Try uninstalling all user apps in safe mode. To get back to the normal mode you can drag down from notification and disable safe mode.
You could also download the latest software for your model from samfirm and flash it via odin after factory reset. Could be a permanent solution.
why you just flash last frimware from sammobile,it will solve all your problems
SOLVED!!!
Alright guys, I was able to solve my problem, all thanks to this thread:
https://forum.xda-developers.com/note-4-sprint/general/stock-tar-odin-flashable-t3250864
I had already tried flashing a fresh stock rom, but to no prevail. I saw this thread and thought, hey why not give it a shot, and bingo! After downloading the .tar file for marshmellow and launching it through odin, she was good as new! So if anyone seems to have a problem with the system ui or the process phone.android popup, I suggest that thread.

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