Database Users

[Q] Please help :( i9505 Constant random reboot issues..

Hey guys..
I've owned all the Samsung Galaxy phones from the S+ right up to the S4 and I've flashed firmwares over all of them with generally no problems at all.
But lately I have a constant issue that has been plaguing my Galaxy S 4 (i9505) phone since I flashed the 4.3 i9505G (GE Edition) ROM over my phone.. (have since moved to OMEGA v12)
The phone just randomly reboots whenever it seems to feel like it.
It could be whilst taking a picture, it could be whilst using google maps, it could be whilst installing an app from the app store or just scrolling across the screen. It's basically rebooted through anything and everything and I've tried pinning it down to something but every time I think that I've got it sorted out. It crashes again whilst doing something else.
1 thing however has got me stumped. The phone has NEVER crashed whilst plugged in. If I keep the phone plugged in, it's never ever just rebooted on its own for me. Which got me thinking that it could be a faulty battery or some sort of voltage issue.
Coming from the 4.3 GE Edition ROM there are other people experiencing random reboots. But now I've just flashed over OMEGA v12 and right after flashing (I did a full wipe of course first) the phone rebooted whilst typing in my Wifi access key. After the reboot I was able to set my phone up and I did a reboot myself, then I went to the app store to add an account and the phone crashed AGAIN.
I'm totally over this issue with my phone. I paid a small fortune for it and I cannot rely on it at all. So I absolutely need it to work. I've had issues on 4.3 GE getting Mobile Data to work. I've had issues with it crashing and I'm just done with all of this.
Do you think that my phone is already broken? (It's barely 3 months old) Do I need to get it replaced under warranty? Can I even get it replaced under warranty, is there a way to even get my warranty back or reset the flash counter etc?
I'm just so confused guys I thought maybe it was my battery, and that my battery was faulty because I had battery percentages dropping and jumping around like mad. For example 15% battery left would actually have the phone turn off... and reboot at 0%. Then the light wouldn't go green for 'Fully charged' and the phone would sit on 99% or 100% but still not say 'charged'. In addition I could swear I had lost more than 10% of my charge in the blink of an eye etc.
I just bought 2 new batteries but they will take a week to get here.. and if the phone is still rebooting (and it isn't a voltage/cut out issue with the battery) then should I assume it's a hardware issue and that the phone needs replacing? Or could it just be a bad flash or something? The phone has at least a 2 year warranty. I don't want to replace it after just 3 months when I haven't even so much as dropped it once.
My recovery is PhilZ 5 Touch 6.0.4.0
I always check MD5 sums before flashing and do a full wipe:
- Wipe Data/Factory Reset
- Clean to Install a New ROM
- Yes
- Then Flash the new .zip file etc.
What on earth could be wrong with my phone?
I'll happily provide any more information, as I honestly cannot handle this happening and I have no idea what my problem is...
Thanks incredibly much for any help at all, what-so-ever.

leijonasisu said:
Hey guys..
I've owned all the Samsung Galaxy phones from the S+ right up to the S4 and I've flashed firmwares over all of them with generally no problems at all.
But lately I have a constant issue that has been plaguing my Galaxy S 4 (i9505) phone since I flashed the 4.3 i9505G (GE Edition) ROM over my phone.. (have since moved to OMEGA v12)
The phone just randomly reboots whenever it seems to feel like it.
It could be whilst taking a picture, it could be whilst using google maps, it could be whilst installing an app from the app store or just scrolling across the screen. It's basically rebooted through anything and everything and I've tried pinning it down to something but every time I think that I've got it sorted out. It crashes again whilst doing something else.
1 thing however has got me stumped. The phone has NEVER crashed whilst plugged in. If I keep the phone plugged in, it's never ever just rebooted on its own for me. Which got me thinking that it could be a faulty battery or some sort of voltage issue.
Coming from the 4.3 GE Edition ROM there are other people experiencing random reboots. But now I've just flashed over OMEGA v12 and right after flashing (I did a full wipe of course first) the phone rebooted whilst typing in my Wifi access key. After the reboot I was able to set my phone up and I did a reboot myself, then I went to the app store to add an account and the phone crashed AGAIN.
I'm totally over this issue with my phone. I paid a small fortune for it and I cannot rely on it at all. So I absolutely need it to work. I've had issues on 4.3 GE getting Mobile Data to work. I've had issues with it crashing and I'm just done with all of this.
Do you think that my phone is already broken? (It's barely 3 months old) Do I need to get it replaced under warranty? Can I even get it replaced under warranty, is there a way to even get my warranty back or reset the flash counter etc?
I'm just so confused guys I thought maybe it was my battery, and that my battery was faulty because I had battery percentages dropping and jumping around like mad. For example 15% battery left would actually have the phone turn off... and reboot at 0%. Then the light wouldn't go green for 'Fully charged' and the phone would sit on 99% or 100% but still not say 'charged'. In addition I could swear I had lost more than 10% of my charge in the blink of an eye etc.
I just bought 2 new batteries but they will take a week to get here.. and if the phone is still rebooting (and it isn't a voltage/cut out issue with the battery) then should I assume it's a hardware issue and that the phone needs replacing? Or could it just be a bad flash or something? The phone has at least a 2 year warranty. I don't want to replace it after just 3 months when I haven't even so much as dropped it once.
My recovery is PhilZ 5 Touch 6.0.4.0
I always check MD5 sums before flashing and do a full wipe:
- Wipe Data/Factory Reset
- Clean to Install a New ROM
- Yes
- Then Flash the new .zip file etc.
What on earth could be wrong with my phone?
I'll happily provide any more information, as I honestly cannot handle this happening and I have no idea what my problem is...
Thanks incredibly much for any help at all, what-so-ever.
Click to expand...
Click to collapse
I can only give you advice on some of the smaller issues that you mentioned. I haven't had a problem with reboots at all (i've flashed all manners of ROMs too, including the GE), so I'm guessing it is hardware related. You should get it replaced (if it still is messing up with the new batteries).
As for warranty, yes you can claim it back on warranty. To be doubly safe, restore it to stock: http://forum.xda-developers.com/showthread.php?t=2265477
Use Triangle Away: http://forum.xda-developers.com/showthread.php?t=1494114
Also FYI, rooting does not void warranty: http://matija.suklje.name/rooting-and-flashing-your-device-does-not-void-the-warranty-in-eu (assuming you are in the EU, not sure about other countries) (gosh i've posted this a lot today).

Thanks a lot buddy I am in the EU definitely and the phone is purchased from the EU. I am actually about to flash it right back to stock now to see if it stops the rebooting issue. I will just have to live without custom roms for awhile and such. If it still keeps crashing I will wait for the new batteries. If it still keeps crashing again after I get those. I guess all that is left to do is render myself without a phone for a week or two and have it repaired...

I wouldn't worry mate it sounds to me like a definite battery issue
Sent from my GT-I9505

similar problem
leijonasisu said:
Thanks a lot buddy I am in the EU definitely and the phone is purchased from the EU. I am actually about to flash it right back to stock now to see if it stops the rebooting issue. I will just have to live without custom roms for awhile and such. If it still keeps crashing I will wait for the new batteries. If it still keeps crashing again after I get those. I guess all that is left to do is render myself without a phone for a week or two and have it repaired...
Click to expand...
Click to collapse
Hi leijonasisu,
I've stumbled across your post after having experienced more or less the same issues as you. After trying many custom ROMs in the last few weeks, the phone has barely been useable for more than a few minutes until it randomly reboots. At which time, I must start over with the whole flashing process. My question is, did getting a new battery resolve your issue? Or did you just trade the device back in?
many thanks

kingzain900 said:
I can only give you advice on some of the smaller issues that you mentioned. I haven't had a problem with reboots at all (i've flashed all manners of ROMs too, including the GE), so I'm guessing it is hardware related. You should get it replaced (if it still is messing up with the new batteries).
As for warranty, yes you can claim it back on warranty. To be doubly safe, restore it to stock: http://forum.xda-developers.com/showthread.php?t=2265477
Use Triangle Away: http://forum.xda-developers.com/showthread.php?t=1494114
Also FYI, rooting does not void warranty: http://matija.suklje.name/rooting-and-flashing-your-device-does-not-void-the-warranty-in-eu (assuming you are in the EU, not sure about other countries) (gosh i've posted this a lot today).
Click to expand...
Click to collapse
Looks like it's better to restore to Samsung stock firmware first then start again from there,
But this will upgrade the the Knox bootloader also.
Stock firmware can be downloaded here, www.sammobile.com/firmwares

I fixed this ages ago. It was a battery issue, I'd bit my bottom dollar that it would be a battery issue for anyone else too, I've read a lot of stuff online about people who have gotten bad batteries with theirs. Swapped to 2 third-party and apparently larger batteries and never had an issue and never looked back.
Sorry for not replying back much sooner but I forgot about the thread.
Try another battery and if within a day or two you get no reboots then toss the bad battery and enjoy your phone! The thing is the battery (due to voltage issues) can make it look like it's the OSes fault when in actual fact it's just a faulty battery and voltage issues.

same problem here.. s4 randomly reboot..

I got the same problem.
The phone reboots every few minutes on me when i want to take it out of standby.
Sometimes it works for a few hours and sometimes it just reboots itself every few minutes or it reboots when i want to do something.
So ur all saying that a new battery could solve my problems ??

Opuske said:
I got the same problem.
The phone reboots every few minutes on me when i want to take it out of standby.
Sometimes it works for a few hours and sometimes it just reboots itself every few minutes or it reboots when i want to do something.
So ur all saying that a new battery could solve my problems ??
Click to expand...
Click to collapse
Hi, the OLD problem WAS caused by the faulty batteries batch (easy to recognize - the battery serial no was beginning with BD code).
Now, more frequently it is resulting from KNOX related issues.

spamtrash said:
Hi, the OLD problem WAS caused by the faulty batteries batch (easy to recognize - the battery serial no was beginning with BD code).
Now, more frequently it is resulting from KNOX related issues.
Click to expand...
Click to collapse
hi thx for the answer.
Could infact be knox issue as i am now back on stock rom without root or anything and im not having any issues now.
But i would like to have a custom rom and root again .
So how would i go from here to there without having random crashes / reboots on custom rom ?

Opuske said:
So how would i go from here to there without having random crashes / reboots on custom rom ?
Click to expand...
Click to collapse
Only one option then: read the ROM-specific threads, loo for feedback posts. If ROM would cause random reboots, you can be certain that it will be written there.

Same issue with gt i9505, random reboot, earlier i had gt i9500 that was flawless with all rom n root n with everything, but i bought gt i9505 and its random reboot like in every 30 to 20 mints, im totally pissed n disappointed ? plzz help....

adilabdi110 said:
Same issue with gt i9505, random reboot, earlier i had gt i9500 that was flawless with all rom n root n with everything, but i bought gt i9505 and its random reboot like in every 30 to 20 mints, im totally pissed n disappointed ? plzz help....
Click to expand...
Click to collapse
Have you disabled everything related to knox and deknoxified your phone?
Do press thanks if my posts are helpful
Sent from my Stock Deodexed i9500 :')

adilabdi110 said:
Same issue with gt i9505, random reboot, earlier i had gt i9500 that was flawless with all rom n root n with everything, but i bought gt i9505 and its random reboot like in every 30 to 20 mints, im totally pissed n disappointed ? plzz help....
Click to expand...
Click to collapse
Uninstall everything realiting to Knox with Titanium backup and be Happy
Sent from my Galaxy S4 using Tapatalk

i9505 S4 sussed out the randomsoft rebooting
i9505 Kitkat random rebooting with UGNG8
UK - BTU
2014 November
I9505XXUGNG8
I9505YXYGNH2
I9505XXUGNG8
4.4.2
For me kitkat UGNG8 with random soft rebooting, tried everything with that firmware I could, reset to default and it was still randomly rebooting when ever it liked. Usually after swiping the screen out of wake lock most of the time. I even re-odin GNG8 3 times.
Cured by Odin with this one, below, which I thought I couldn't, because of the backward compatibility of the dates, but it went in ok. No reboots for weeks. Cured my i9505 S4
2014 July UK - BTU
I9505XXUFNB9
I9505BTUFNE1
I9505XXUFNB9
4.4.2
Link http://www.sammobile.com/firmwares/download/31852/I9505XXUFNB9_I9505BTUFNE1_BTU.zip/
So if you pulling you`re hair out with the S4, or trying to get rid, Odin this firmware first.

satelliteone said:
i9505 Kitkat random rebooting with UGNG8
UK - BTU
2014 November
I9505XXUGNG8
I9505YXYGNH2
I9505XXUGNG8
4.4.2
For me kitkat UGNG8 with random soft rebooting, tried everything with that firmware I could, reset to default and it was still randomly rebooting when ever it liked. Usually after swiping the screen out of wake lock most of the time. I even re-odin GNG8 3 times.
Cured by Odin with this one, below, which I thought I couldn't, because of the backward compatibility of the dates, but it went in ok. No reboots for weeks. Cured my i9505 S4
2014 July UK - BTU
I9505XXUFNB9
I9505BTUFNE1
I9505XXUFNB9
4.4.2
Link http://www.sammobile.com/firmwares/download/31852/I9505XXUFNB9_I9505BTUFNE1_BTU.zip/
So if you pulling you`re hair out with the S4, or trying to get rid, Odin this firmware first.
Click to expand...
Click to collapse
Interesting will have to give this a go, also the battery option.
For months I was running on Lollipop custom ROM, the developer did an upgrade and then the SIM card removed error started. I went back to the old version was keep getting the SIM Card removed error. A few days ago went back to Original ROM for NZ 4.4.2 and I still get the SIM Card error and now the phone just reboots randomly.

Random Rebooting!! Please Help!

Hey, I have The Samsung Galaxy S5 for a year and a half now. For about the past 9 months, the phone would trigger random reboots but they wouldn't be a full reboot. What I mean by this is that the phone would not ask me for my SIM card pin as it would do whenever I'd restart or reboot the phone manually. Also when I boot it into recovery mode, a dead droid icon comes up right before showing up the recovery mode screen.
I have tried the following:
Clearing cache
Factory Formatting
Reflashing OS/ROM
Running Safe Mode
Running the phone clean
Running without SD card
And running without SD card and clean
This is really annoying and a reply and possible help would be really helpful.
P.s. I have tried going to my operator and the phone was sent away and 'repaired' but this problem is still persistent.

Hello Dude!
In my opinion this sounds like a hardware, not a software problem. Does your CPU/GPU heat up often/fast? This could happen an overload and than your phone reboots. Furthermore, did you overclocked your phone in any way? I got the same problem after doing that. More possible reasons I can't imagine.
If you have some questions, ask me

JAnx0 said:
Hello Dude!
In my opinion this sounds like a hardware, not a software problem. Does your CPU/GPU heat up often/fast? This could happen an overload and than your phone reboots. Furthermore, did you overclocked your phone in any way? I got the same problem after doing that. More possible reasons I can't imagine.
If you have some questions, ask me
Click to expand...
Click to collapse
Hey, I actually don't really overclock phones which I use (I only do it with ones that are a spare and something to mess around with. Also no it doesn't tend to heat up on me at all actually. It restarted 3 times in space of 30 minutes this morning by simply watching youtube. The resets are random and can happen at any state of the phone.
Thanks for the reply. I appreciate it.

rabbo said:
Hey, I actually don't really overclock phones which I use (I only do it with ones that are a spare and something to mess around with. Also no it doesn't tend to heat up on me at all actually. It restarted 3 times in space of 30 minutes this morning by simply watching youtube. The resets are random and can happen at any state of the phone.
Thanks for the reply. I appreciate it.
Click to expand...
Click to collapse
Ohh okay. Anyways I think that this is a hardwareproblem. I am sure that your problem is very rarely as well.
I think only Samsung or a new phone will solve this problem.
Good Luck!

Note 4 freezes and restarts issue! Ultimate thread

Hello everyone,
I've had my note 4 over two years now and out of nowhere problems started happening after second MM update, model SM-N910F was freezing and restarting and sometimes was not able to boot normally and got mmc read fail.
I'm reading a lot about this problem in other forums and here, so hope someone could help about this issue.
No Success:
I tried anything from removing sd card, removing sim card, changing the battery, resetting the device, cleaning the cache, flashing the room through odin, flashing the rom with pit file and doing a re partition (Didn't tried Nand erase).
Success:
The only way that I was able to fix the freeze issue was by installing app called Wake Lock and enabling PARTIAL_WAKE_LOCK.
But using Wake Lock has its disadvantages. First of all you need to run the app all times which its not practical and second it wipes your battery because it keeps device and processor awake.
Please join this thread anyone who has similar issues with the aim to fix or bring the phone to an usable state again.

I also purchased my GN4 about 2 years ago and just recently got this error. This is really fishy. Wouldn't be surprised if it was Samsung trying to screw over all the root users and get us to upgrade to newer models.

The Sponge said:
I also purchased my GN4 about 2 years ago and just recently got this error. This is really fishy. Wouldn't be surprised if it was Samsung trying to screw over all the root users and get us to upgrade to newer models.
Click to expand...
Click to collapse
Did you tried Wake Lock if it works? Which model of GN4 do you have ?

shpeendi said:
Did you tried Wake Lock if it works? Which model of GN4 do you have ?
Click to expand...
Click to collapse
Yes, I'm on the Canadian SM-N910W8 model of GN4.
I've been using the Wake Lock app for a few days now and it works perfectly, if you can get the phone to boot into homescreen that is.
For instance, when the phone shuts off due to low battery or an inevitable crash, sometimes getting the phone to boot up is a real pain in the ass because it doesn't boot up correctly most of the time.
However, one odd fix I've discovered is to put your phone and battery in the fridge for about 2-3 minutes and let it cool down completely. And then magically your phone will boot up properly to homescreen again. Activate Wake Lock and you're pretty much good until the next time your phone shuts off and can't boot. My phone will NEVER boot up to homescreen if it is even slightly hot in temperature. In order to boot, it needs to be cool.
I am highly confident that this is indeed a hardware issue, instead of a software issue. The mainboard fails to read memory properly which probably indicates that the mainboard needs to be replaced. I however cannot afford to do this so I hope that I can last atleast 2-3 years of my GN4 surviving through Wake Lock. :crying:

The Sponge said:
Yes, I'm on the Canadian SM-N910W8 model of GN4.
I've been using the Wake Lock app for a few days now and it works perfectly, if you can get the phone to boot into homescreen that is.
For instance, when the phone shuts off due to low battery or an inevitable crash, sometimes getting the phone to boot up is a real pain in the ass because it doesn't boot up correctly most of the time.
However, one odd fix I've discovered is to put your phone and battery in the fridge for about 2-3 minutes and let it cool down completely. And then magically your phone will boot up properly to homescreen again. Activate Wake Lock and you're pretty much good until the next time your phone shuts off and can't boot. My phone will NEVER boot up to homescreen if it is even slightly hot in temperature. In order to boot, it needs to be cool.
I am highly confident that this is indeed a hardware issue, instead of a software issue. The mainboard fails to read memory properly which probably indicates that the mainboard needs to be replaced. I however cannot afford to do this so I hope that I can last atleast 2-3 years of my GN4 surviving through Wake Lock. :crying:
Click to expand...
Click to collapse
I really don't think it's an hardware issue but even if so, why this started to happen immediately after the update and why it only happens when the device goes to sleep or when we power on the device.
I also noticed the change on bootloader fonts and interface after the update. I'm suspecting that the problem is there.
Does any one has any thoughts about this?

It's a hardware issue. It's a bad nand issue in fact. You can find Reddit posts a mile long about it.
Anyways it will slowly get worse over time. Had to replace the main-board in my SM-N910W myself.

ciscostud said:
It's a hardware issue. It's a bad nand issue in fact. You can find Reddit posts a mile long about it.
Anyways it will slowly get worse over time. Had to replace the main-board in my SM-N910W myself.
Click to expand...
Click to collapse
Is there any reason at all why it is happening I mean for the nand issue. I don't like the answer that is motherboard fault and we should replace it, which probably means replacing the phone. Is there anyone who can see deeper into the motherboard to find the issue. I also insist that this started to happen immediately after the second MM update.
I still have an IPhone 3G from 2008 and never changed anything on it. Isn't that ironic ?

shpeendi said:
Is there any reason at all why it is happening I mean for the nand issue. I don't like the answer that is motherboard fault and we should replace it, which probably means replacing the phone. Is there anyone who can see deeper into the motherboard to find the issue. I also insist that this started to happen immediately after the second MM update.
I still have an IPhone 3G from 2008 and never changed anything on it. Isn't that ironic ?
Click to expand...
Click to collapse
It was a Bad batch of nand chip that started to go bad after a year or two. Note 4s started to drop like flies before April.
I think your in the 1st stage of Loss and Grief. 1st stage is denial.

If thats so than Samsung should repair our phones under warranty and not tell us we have to pay for the repair coz we installed custom roms.

The Sponge said:
Yes, I'm on the Canadian SM-N910W8 model of GN4.
I've been using the Wake Lock app for a few days now and it works perfectly, if you can get the phone to boot into homescreen that is.
For instance, when the phone shuts off due to low battery or an inevitable crash, sometimes getting the phone to boot up is a real pain in the ass because it doesn't boot up correctly most of the time.
However, one odd fix I've discovered is to put your phone and battery in the fridge for about 2-3 minutes and let it cool down completely. And then magically your phone will boot up properly to homescreen again. Activate Wake Lock and you're pretty much good until the next time your phone shuts off and can't boot. My phone will NEVER boot up to homescreen if it is even slightly hot in temperature. In order to boot, it needs to be cool.
I am highly confident that this is indeed a hardware issue, instead of a software issue. The mainboard fails to read memory properly which probably indicates that the mainboard needs to be replaced. I however cannot afford to do this so I hope that I can last atleast 2-3 years of my GN4 surviving through Wake Lock. :crying:
Click to expand...
Click to collapse
same issue here, exactly as described above...
any way to push Samsung to admit bad batch and fix it for us with no charge?

golden_m said:
same issue here, exactly as described above...
any way to push Samsung to admit bad batch and fix it for us with no charge?
Click to expand...
Click to collapse
I've already swaped a few main-boards. Ive even put a international exynos n910c main-board in a broken canadian snapdragon note 4 and its works perfect.
If anyone needs help just pm me.

ciscostud said:
I've already swaped a few main-boards. Ive even put a international exynos n910c main-board in a broken canadian snapdragon note 4 and its works perfect.
If anyone needs help just pm me.
Click to expand...
Click to collapse
I would be more interested in understanding how come so many Note 4 devices started acting up around same time mark...

This is definitely a hardware problem with the motherboard. Mine started giving the same symptoms 2 weeks after the 6.01 upgrade. Wakelock made it stable but after Samsung replaced the motherboard it is so much faster and no issues at all. I wonder if this is a faulty NAND issue whether the 6.01 upgrade and the way it manages memory could have triggered it. Certainly strange but it need Samsung to fix it.

I am also having same problem.
I was using custom rom and it was working fine without any lag or freeze suddenly one day my Note fall from bed to ground and since then it is not working properly i thought its the ROM so i reverted back to stock MM rom flashed via odin.
Reset everything erased everything but the problem remains same.
At present i am on stock with hardly any apps just FB and whatsapp.
But my device is so slow and keep lagging and sometimes it becomes very hot and restart itself.
I dont know what to do now. i m on 910 G snapdragon.

anasrizvi said:
I am also having same problem.
I was using custom rom and it was working fine without any lag or freeze suddenly one day my Note fall from bed to ground and since then it is not working properly i thought its the ROM so i reverted back to stock MM rom flashed via odin.
Reset everything erased everything but the problem remains same.
At present i am on stock with hardly any apps just FB and whatsapp.
But my device is so slow and keep lagging and sometimes it becomes very hot and restart itself.
I dont know what to do now. i m on 910 G snapdragon.
Click to expand...
Click to collapse
Sorry to hear that, as for now jut install wake lock and enable partial_wake_lock so you can use your device until it fails completely

Mmm. I was thinking to root my phone (4month old still under warranty ) i think i changed my mind after reading this ?. Thank you guy's for the warning
Sent from my SM-N910G using Tapatalk

Same issues, I downloaded the wake lock and so far so good.

I have the same issue also guys and it started a week after updating to Marshmallow.
Phone worked perfectly fine for 2 years prior to this. So I highly doubt its a hardware issue and more likely a software/firmware problem.
Phone seems to have issues whenever the screen is asleep (hence why the wake lock app seems to help with this problem although not a proper solution)
I'm hoping Samsumg can release a patch fix for this as I truly love my Note 4 and would like to keep it for some time yet.

have anybody tried going back to Lollipop?

golden_m said:
have anybody tried going back to Lollipop?
Click to expand...
Click to collapse
I was thinking about that! but I saw on other threads people downgrading with no success.

Note 4 N910F shutting down with no reason.

Hello! I've been using my Note 4 since its launch with no issues. 2 days ago the phone started acting weirdly. It would shut down without any reason. It doesn't go back to Samsung logo, it just shuts down without any warning. The strange thing is that when the screen is black I can feel 2 weak vibrations if I push the power button briefly. If I hold the power button the phone will boot normally. I've tried everything: system/cache/memory wipe, flashed new bootloader and kernel, I've tried 3 different batteries and tested that the phone is not overheating. I'm out of ideas right now. Can someone help me with that issue?

Same here. I'm suspicious of the recent Google Play updates (protect, services, instant apps, assistant etc.), but I don't know for sure.

macmobile said:
Same here. I'm suspicious of the recent Google Play updates (protect, services, instant apps, assistant etc.), but I don't know for sure.
Click to expand...
Click to collapse
Is there anything I could try to see if that's the problem?

It's the same for me. I try to reinstall with all the possibility, nand erase, pit, firmware in 4 part.
Ever the same
( SM-N910F_1_20170720074440_bfv77row9m_fac)
(excuse my english)
Rom

Last sudden shut down 7 hours ago. So far it's doing ok. Some hiccups here and there, but nothing to write home about. If there's another spontaneous shutdown, I'm ready for a factory reset.

I don't know, sometimes it shuts down and sometimes it reboots. 3 reboots and 2 shutdowns today so far. I'm starting to think that the issue might be hardware related.

RexpertOfficial said:
I don't know, sometimes it shuts down and sometimes it reboots. 3 reboots and 2 shutdowns today so far. I'm starting to think that the issue might be hardware related.
Click to expand...
Click to collapse
Could be, you never know.

Try this
https://www.youtube.com/watch?v=d1PaxEr76KY
https://play.google.com/store/apps/details?id=eu.thedarken.wl

My SD card was automatically deactivated after the last reboot. Let's see if there's any improvement.

Eudemony said:
Try this
https://www.youtube.com/watch?v=d1PaxEr76KY
https://play.google.com/store/apps/details?id=eu.thedarken.wl
Click to expand...
Click to collapse
Nope, still no improvement. It might be an issue with the baseband. When the connection is down or LTE+ is stable it won't reboot/shut down. When I'm in an area with weak LTE connection it reboots when switching to Edge.

macmobile said:
My SD card was automatically deactivated after the last reboot. Let's see if there's any improvement.
Click to expand...
Click to collapse
Please let me know if anything changes.

The device feels indeed much faster again. Since my SD card was close to full, it might be the reason for all of these issues.

RexpertOfficial said:
Nope, still no improvement. It might be an issue with the baseband. When the connection is down or LTE+ is stable it won't reboot/shut down. When I'm in an area with weak LTE connection it reboots when switching to Edge.
Click to expand...
Click to collapse
Ok, weird! You can turn off edge in settings but I guess that doesn't really help you.
what I would do next is dirty flash the same firmware using odin (which will keep all your apps/data)
Are you using official firmware or custom?

Experienced another reboot even without the SD card. It's about time to flash the original firmware again.

Eudemony said:
Ok, weird! You can turn off edge in settings but I guess that doesn't really help you.
what I would do next is dirty flash the same firmware using odin (which will keep all your apps/data)
Are you using official firmware or custom?
Click to expand...
Click to collapse
Custom. I'm using Ramrom v11 with RamKernel. I forced the phone in WCDMA only (H+) and I didn't have any issue since then. I'm also using the latest modem version. Looks like it could be a problem with LTE switching to Edge.
Yesterday I performed the 5th full wipe and flashed the ROM again. Still got the problem when the LTE signal is weak.

macmobile said:
Experienced another reboot even without the SD card. It's about time to flash the original firmware again.
Click to expand...
Click to collapse
I doubt it would solve your problem. I mean I've been wiping and flashing ROMs for 3 days without solving anything. Give it a try, maybe it'll work for you.

You're right. No success. Any suggestion what to do next? Edit: Will contact Samsung support tomorrow. [emoji24]

macmobile said:
You're right. No success. Any suggestion what to do next? Edit: Will contact Samsung support tomorrow. [emoji24]
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Click to collapse
It seems that my phone doesn't like my home. It only reboot indoor with LTE enabled.

Went to the Samsung Customer Service. Mainboard damage, most likely eMMC, they didn't say exactly. 300 Euros for repair.

If it happens after update 6.0.1 then
Remove battery and put your phone in front of AC for 5 min and then insert battery and try to start it .
After that install wakelock and keep your cpu awake
Hope this helps

Note 4 restarts after homescreen and becomes hot. No such problem in TWRP mode.

I have SM-N910F which I bought second hand few years ago and installed various rom in the early stages. So my IMEI doesn't match the printed one last time I checked. And I don't know which country it was imported from.
My note 4 starts normally and goes upto home screen. Then after few seconds (~20) it restarts and the cycle continues. The time the homescreen lasts after reboot becomes shorter and shorter and temperature also rises. The part of temperature rise is where memory card is located. I have no sim and memory card in phone now.
So far I have flashed official firmware (Germany. But IDK which one should I install) and tried also using even power lock (upto full wake lock) but still the problem persists.
But one thing that I am amazed is if I install twrp and do whatever operation in TWRP (copying to making backup) even for 40 mins continuous, there is no overheating.
There is no mention of EMMC fail while the phone switches on
Also if I shake my phone, it rattles near rear camera module. Optical image stabilizer or the point of possible problem?

Heat probably softened the solder enough for something to come lose, which can explain the rattling....or there's something external floating around inside the phone, like a screw.
On the software side of things, it might be exactly that.
Is this problem reoccurring on multiple ROMs including stock, or has it been related to custom roms?

ninjasinabag said:
Heat probably softened the solder enough for something to come lose, which can explain the rattling....or there's something external floating around inside the phone, like a screw.
Click to expand...
Click to collapse
I will open this phone few weeks later when I am back home.
ninjasinabag said:
On the software side of things, it might be exactly that.
Is this problem reoccurring on multiple ROMs including stock, or has it been related to custom roms?
Click to expand...
Click to collapse
It happens on both official and custom rom. Without installing TWRP on official rom, I get dm-verity failed.

Lot of note 4`s have this issue now including mine
People using note 4 over 2 years face this issue. Some people use a wake lock app to overcome. Some downgrade to 5.1.1. I will downgrade os and see. This problem is irritating to core.

ben.james046 said:
People using note 4 over 2 years face this issue. Some people use a wake lock app to overcome. Some downgrade to 5.1.1. I will downgrade os and see. This problem is irritating to core.
Click to expand...
Click to collapse
I will see with downgrading to 5.1.1.