Database Users

[ISSUE] Nexus S having nightly "sign-offs"

Most of us here love our Nexus S phones. We love Android 2.3's speed and the neat little TV effect when we lock our screens. Since Friday morning, (Feb. 11th) my Nexus S seems to be having another TV effect: nightly "sign offs."
It does not matter if I was charging the phone or not, the phone would just stop working. The strip of touch buttons along the bottom of the phone could be lit or unlit, but the screen would just turn off and no button presses would wake the phone. If I plugged it in to a computer, you could hear a "device connect" noise and see the Android hard drive appear under the Device Manager in Windows.
All of this means that the Nexus S was powered, but not responding. It would not reboot itself, and yes, I have experienced the reboot issue. This seems to be a separate issue. This only seems to happen after midnight.
The only solution is to pull out the battery and reboot it manually.
If my Nexus S is still on when this silent crash occurs overnight, my battery could be completely drained by the time I wake up, making me plug it in AND requiring a battery pull.
Has anyone else had this issue occur? According to the Android Market, I've only updated a few programs recently, one of them being Twitter.
Some Recently Updated Programs: (most recent first)
T-Mobile My Account (to 5.0.15)
Google Authenticator (installed, 0.54)
Google Goggles (to 1.3.1)
Twitter (to 2.0.0)
Amazon MP3 (to 1.8.30)
Google Books (to 1.1.4)
System Info:
Stock, unrooted Nexus S
Launch day unit
T-Mobile USA
Android 2.3.2
Baseband I9020XXJK8
Kernel 2.6.35.7-g7f1638a [email protected] #1
Build GRH78C
When I woke up on Friday, I called Samsung and they did note the issue under my phone number. I will call them again Monday and let them know I'm still having issues.
Any help/suggestions from the XDA community would be appreciated.
Thank you!

Just checked this morning, (Monday) and I had to pop out the battery to turn the phone back on. Before I went to sleep, my battery was at 100%. When I woke up and booted the phone up, it was around 30%. A 70% drop in 8 hours. Time to call Samsung again.
No one else is having this issue?
Sent from my Nexus S using XDA App

Sounds like either a defective unit, or messed up software.
Try doing a factory reset and use don't install many apps and see if that resolves for problems for a day or 2.

Well I had a strange issue that I had never seen before... at around midnight last night both my NS and my gf's went into bootloop at the same time, it was freaky. We're both on CM7 but hers is an older build and mine has netarchy's but it's never happened before... pulling the battery and powering back on fixed both phones but it's still very weird.

I have never actually called the manufacturer before about any issues with a device. Do they do anything for you? Or help you in any way?
Sent from my Nexus S using XDA App

Samsung suggested that I do a factory reset and then if that does not fix the issue, then I'll have to send the phone into them. The tech I got on Friday was more knowledgeable than the one I got today. I'm going to backup my data and then do a factory reset, making sure not to "pull" my data from Google's servers.
Man, not doing that is going to suck.
I am also using Google Voice for my voicemail. Just wanted to throw that out there in case any running services or something is causing all of this. I'm thinking that the new version of Twitter is causing this, as it's baked into Android now and there was an update recently. Thoughts?

Here's a small update on my issue: it seems to be software-related. My Nexus S crashes during the day as well, requiring a battery pull as described above. Disabling sync does not solve the issue, so it doesn't seem like it's coming from that area. What would you guys suggest my next place to look be?
Thanks!

Well, have been having almost the same issue for the past two days. Go to bed with 57 & 63%. Get up in the morning and the phone is dead. Not sure of the exact time it.passes away, but yeah.
Can't understand why the phone has to drink while I sleep.
Sent from my Nexus S using XDA App

Same prob, only intermitant though. Im using rc1 now, with no custom kernel.
Sent from my Nexus S using XDA App

I've been having the same issue since the 13th of Feb. At first it would freeze only overnight. Now, since the 14th it freezes while asleep 4-5 times a day, and the only way to get it working is to do a battery pull. I've tried to remove recently installed apps and widgets, but that has made no difference. I really don't want to have to do a factory reset, especially after I've been reading on google forums about other users not noticing a difference after a factory reset. This is getting ridiculous.
Unrooted Nexus S
Android 2.3.2
Baseband I9020XXJK8
Kernel 2.6.35.7-g7f1638a [email protected] #1
Build GRH78C
T-Mobile US

Agreed. Mine started to freeze during the day as well, requiring a battery pull. Do you have the new Twitter installed? Do you use Google Voice for voicemail? I'm trying to pull together some common threads. It's definitely software related.
Edit: OK, now this is just stupid. It seems like I'm freezing up every half an hour by now. I pull the phone from my pocket to check on something and I push the power button. The lockscreen shows, but the screen and touch buttons don't respond. Battery pull is the only option.

Yes, I do have the new Twitter installed, and yes, I do use Google Voice.
It seems to be happening more often now for me as well. Sometimes it takes two to three times for it to fully restart and get to the home screen, or the lock screen, and sometimes it will wake and then freeze on my pattern lock which also requires a battery pull.
I've starred a few forums on this same issue on the Google support forums, I hope others do the same to show support for a quick fix.

Last night I had the battery at 90. Switched of Wifi, Data and Sync.
Got up this morning and ... no probs The battery dropped to just 88!
BTW. I have got a stock unrooted phone with no Google Voice or twitter so, could not really be a problem related to that.
I use the app addin timer to run stuff at particular times. Other apps that I downloaded are calcbuddy, barcode scanner (which I think is pointless and going to remove), pure messenger, calwidget, appbrain (again, did not like the new updated one), aTakephone, Flip4Silence, CoPilot, Fast Reboot, Docs to Go, Skype, Remote Desktop, StockIndia, Tunein Radio and Widgetsoid.

Thanks for letting me know the apps you have installed. The only common ones between us are:
Barcode Scanner
Skype
Barcode scanner is actually useful. (QR Codes, etc.) Skype may have something to do with it as it does integrate itself with data sync. Thoughts?
In order for this theory to hold water, your phone must:
Crash and require a battery pull to be responsive
Have Skype installed
Edit: My phone was crashing so much that the "first time/welcome" wizard was coming up. Swype, Facebook and GMail were crashing left and right. Time for another Factory Reset....
Edit 2: The phone has SOMEHOW survived a Factory Reset from the normal phone menu AND the Recovery menu! WHAT?!

My Nexus S is going back to Samsung for repair. *sigh* I wonder what they'll say caused the issues?
Sent from my Nexus One using XDA App

Now, today, the phone doesn't get passed the initial "Google" screen. No matter how many times I pull the battery, plug it into a charger or usb port, it does not go past the first google screen. Very disappointing.

Can you get into the bootloader menu? (Volume Up + Power)

Yes, that allowed me to get to the bootloader menu, but I couldn't do a factory reset, it just sat at the screen with the android and an exclamation point inside a triangle. I then did a battery pull, tried a normal restart and got to my home screen.

Glad to hear that you got in. By the way, once you get to the exclamation point screen, you can push Power while holding the Volume Up button to bring up a menu.

Cool, thanks for the help!!

[Q] Settings change by themselves

It started as a weird feeling. I thought that I had just forgotten that I had changed a setting or two. But now I am certain that the phone changes some settings by itself.
Knock on keeps turning off by itself . I did also enable led notifications a couple of hours ago only to find them turned off now , after I plugged in my device (I didn't see the red light when I locked the screen). I am completely stock . I haven't received the latest OTA update though. Do I need to see a shrink or something strange is going on with the phone's software ?

sachilleas said:
It started as a weird feeling. I thought that I had just forgotten that I had changed a setting or two. But now I am certain that the phone changes some settings by itself.
Knock on keeps turning off by itself . I did also enable led notifications a couple of hours ago only to find them turned off now , after I plugged in my device (I didn't see the red light when I locked the screen). I am completely stock . I haven't received the latest OTA update though. Do I need to see a shrink or something strange is going on with the phone's software ?
Click to expand...
Click to collapse
I suggest you get an exorcist for your phone immediately, anyways all joking aside did this just begin or has it been happening for a while now, have you installed any weird apps/modules(if rooted), as a last resort you can backup apps(via carbon if not rooted or titanium backup if you are rooted) and music/videos/pictures to your pc and factory resetting to see if the issue persist

XxZombiePikachu said:
I suggest you get an exorcist for your phone immediately, anyways all joking aside did this just begin or has it been happening for a while now, have you installed any weird apps/modules(if rooted), as a last resort you can backup apps(via carbon if not rooted or titanium backup if you are rooted) and music/videos/pictures to your pc and factory resetting to see if the issue persist
Click to expand...
Click to collapse
Thank you once again for you answers. I have the phone 3-4 days as I wrote to you in the other thread ! It has been happening from day one. I am completely stock , no root , no nothing. I don't want to hard reset but it may be obligatory in this case.

Yes, I have seen the LGG2 reset settings as well
sachilleas said:
It started as a weird feeling. I thought that I had just forgotten that I had changed a setting or two. But now I am certain that the phone changes some settings by itself.
Knock on keeps turning off by itself . I did also enable led notifications a couple of hours ago only to find them turned off now , after I plugged in my device (I didn't see the red light when I locked the screen). I am completely stock . I haven't received the latest OTA update though. Do I need to see a shrink or something strange is going on with the phone's software ?
Click to expand...
Click to collapse
I am so glad to see someone else posting about this. This happens to me so often and is so frustrating.
I see several different changes happening fairly frequently:
1. Date/time settings get changed (auto date time gets disabled, auto time zone gets disabled, use24 hour gets enabled, various combinations of these 3 settings change)
2. Knock on/off gets turned off
Less frequently:
1. Auto rotate turns off
2. Home Screen Background resets and/or theme changes
3. Allow Home screen looping gets disabled
I have Verizon LGG2, rooted,
Android 4.4.2
Baseband version: VS98024A-M8974A-AAAANAZM-2.0.20046
Kernel Version 3.4.0-perf-gdf89a11
Build Number: KOT491,VS98024A
have been unsuccessful updating to the latest OTA - figured it was because of root, after uninstalling root still had the error.
Not sure if that is related.
Both the reset issue and the lack of OTA update are annoying, but not so problematic that I want to reset my phone.
If anyone has seen this issue and/or has suggestions (including reset, I suppose), I'd appreciate it.
Thanks i n advance.
Dave

Phone keeps turning off! Never while using it & sometimes when phone is not moving.

Phone keeps turning off! Never while using it & sometimes when phone is not moving.
I have an LG-D801 running 4.4.2 kernal 3.4.0 and software D80120a. I also have and use TWRP for recovery. Ever since I rooted my phone and installed this rom, everything has been perfect! That was about 4 months ago. I have and use lots of apps, most of which I have been using for years without any issues. Lately I have been finding my phone off in my pocket for some reason. It now is happening maybe 6-10 times a day which is really getting annoying.
The LG G2 battery doesn't come out so not like it got loose. I have tested it by sitting on the desk lightly and checking it later to STILL find it turned off. So I know I'm not bumping it. I have tried an app killer to kill apps before turning off the screen but it still seems to happen. The phone is still relatively new so I doubt it's hardware, I baby my phones.
Any ideas for ways to make it STAY on without flashing a new rom? Or maybe ideas for how to diagnose what is shutting it down?
(I am looking for ideas and useable feedback, please don't respond that my phone has hardware issues and needs to be replaced!)

UnknownCloakedMan said:
I have an LG-D801 running 4.4.2 kernal 3.4.0 and software D80120a. I also have and use TWRP for recovery. Ever since I rooted my phone and installed this rom, everything has been perfect! That was about 4 months ago. I have and use lots of apps, most of which I have been using for years without any issues. Lately I have been finding my phone off in my pocket for some reason. It now is happening maybe 6-10 times a day which is really getting annoying.
The LG G2 battery doesn't come out so not like it got loose. I have tested it by sitting on the desk lightly and checking it later to STILL find it turned off. So I know I'm not bumping it. I have tried an app killer to kill apps before turning off the screen but it still seems to happen. The phone is still relatively new so I doubt it's hardware, I baby my phones.
Any ideas for ways to make it STAY on without flashing a new rom? Or maybe ideas for how to diagnose what is shutting it down?
(I am looking for ideas and useable feedback, please don't respond that my phone has hardware issues and needs to be replaced!)
Click to expand...
Click to collapse
Are you sure it's actually off and not just asleep and not waking up. I've never seen a generally working phone turn itself off. On another device we called it the SOD (Sleep of Death) and required a long press on the power to reboot. It's most likely a rooted app like something Xposed related perhaps.

wolfclan68 said:
Are you sure it's actually off and not just asleep and not waking up. I've never seen a generally working phone turn itself off. On another device we called it the SOD (Sleep of Death) and required a long press on the power to reboot. It's most likely a rooted app like something Xposed related perhaps.
Click to expand...
Click to collapse
How can I tell the difference? Basically I press the power button once quickly to turn the screen on and it doesn't come on. I hold it for maybe 3 seconds and get the booting up stuff. I am guessing if it was sleeping I'd have to hold it much longer?

UnknownCloakedMan said:
How can I tell the difference? Basically I press the power button once quickly to turn the screen on and it doesn't come on. I hold it for maybe 3 seconds and get the booting up stuff. I am guessing if it was sleeping I'd have to hold it much longer?
Click to expand...
Click to collapse
Yeah bud, that's a new one on me. Do you have any root apps that could be the cause? Like Xposed.

wolfclan68 said:
Yeah bud, that's a new one on me. Do you have any root apps that could be the cause? Like Xposed.
Click to expand...
Click to collapse
Thanks for the help. After reading your previous post, I decided to remove GravityBox KK and Xposed. I was using it because I find it annoying that when I plug in my phone at night, it turns on my screen. Not a big deal...
I also use SuperSU and LuckyPatcher which both use root. The only other thing I can think of is that I semi-recently upgraded my Play Store (v4.8.19 using Lucky Patcher) which I had some troubles with. It kept saying my /system was out of space and for some reason, even with root, it tells me acces denied when changing stuff inside the /system such as boot animation.

so... just an update. It's still doing it even after I uninstalled all the apps that need root. I really wish there was a log or something (like Windows) to tell me why it keeps turning off!
I have noticed it seems to happen much more often if I am texting somebody even though I'm using the default app for messages. It literally was turning off after every message I sent early before the other person was able to reply for about 5 messages in a row.

Note 4 freezes while charging after lollipop

I tried posting this in the Sprint thread but haven't gotten any answers yet so perhaps I'll have better luck here. I pasted both posts to show the initial problem and what I did (essentially I factory reset). I'm still having the same problem where my phone will freeze while I'm charging it (about 2-3 times/week) requiring a battery pull. Anybody else seeing this problem or have suggestions on what I should try? Thanks.
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Twice this week my alarm didn't go off (luckily I set a backup today) because sometime throughout the night something happened. When I woke up the phone was frozen on the yellow Sprint Spark startup screen. I needed to pull the battery and everything started up fine. I updated to Lollipop about 2 weeks ago which is where I'm guessing the issues stem from.
Is there anything I should try other than restoring to factory and starting over? I'd prefer to not have to wipe everything from my phone but these issues are becoming problematic. I am not rooted.
Thanks.
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So I ended up doing a factory reset and while the phone certainly started running faster with better battery performance after the reset I'm still having this issue. I would say it occurs 2-3 times a week. It has only occurred overnight which is typically when I charge my phone so I'm pretty sure it is related to being left connected to the charger. The majority of the times I will wake up with a dim yellow Sprint screen and everything else frozen though occasionally the screen will be black with the led notification light red. In both situations the screen will not respond to any button pushes or holds and I need to pull the battery and then everything will start up fine.
Does anybody have any suggestions here on what I should do? I guess I can try and restore one more time and see but I don't really know why it would be different and it is certainly a pain to keep restoring the phone and losing all my settings. I definitely don't want to root now since I believe that voids the warranty and if I can't figure anything out with this I'll certainly be requesting a new phone from Sprint. Before I start dealing with Sprint though I thought I would check here first. Through all my searches on the internet I haven't seen anyone else complaining about this problem.
Thanks.

ks-man said:
I tried posting this in the Sprint thread but haven't gotten any answers yet so perhaps I'll have better luck here. I pasted both posts to show the initial problem and what I did (essentially I factory reset). I'm still having the same problem where my phone will freeze while I'm charging it (about 2-3 times/week) requiring a battery pull. Anybody else seeing this problem or have suggestions on what I should try? Thanks.
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Twice this week my alarm didn't go off (luckily I set a backup today) because sometime throughout the night something happened. When I woke up the phone was frozen on the yellow Sprint Spark startup screen. I needed to pull the battery and everything started up fine. I updated to Lollipop about 2 weeks ago which is where I'm guessing the issues stem from.
Is there anything I should try other than restoring to factory and starting over? I'd prefer to not have to wipe everything from my phone but these issues are becoming problematic. I am not rooted.
Thanks.
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So I ended up doing a factory reset and while the phone certainly started running faster with better battery performance after the reset I'm still having this issue. I would say it occurs 2-3 times a week. It has only occurred overnight which is typically when I charge my phone so I'm pretty sure it is related to being left connected to the charger. The majority of the times I will wake up with a dim yellow Sprint screen and everything else frozen though occasionally the screen will be black with the led notification light red. In both situations the screen will not respond to any button pushes or holds and I need to pull the battery and then everything will start up fine.
Does anybody have any suggestions here on what I should do? I guess I can try and restore one more time and see but I don't really know why it would be different and it is certainly a pain to keep restoring the phone and losing all my settings. I definitely don't want to root now since I believe that voids the warranty and if I can't figure anything out with this I'll certainly be requesting a new phone from Sprint. Before I start dealing with Sprint though I thought I would check here first. Through all my searches on the internet I haven't seen anyone else complaining about this problem.
Thanks.
Click to expand...
Click to collapse
Hi there. I have a Canadian Note 4 (W8) with Bell, and I am having identical issues.
While charging over night, I find my phone stuck on "Samsung" logo, with the bubble animal still running. Holding down the power button does nothing and the only work around is the battery pull. I noticed that it also gets warm (assuming from the screen on time?)
First tried cache wipe - no fix
Factory reset - no fix
Cache wipe again - no fix
Aaaand today I came into work late

jbkmin said:
Hi there. I have a Canadian Note 4 (W8) with Bell, and I am having identical issues.
While charging over night, I find my phone stuck on "Samsung" logo, with the bubble animal still running. Holding down the power button does nothing and the only work around is the battery pull. I noticed that it also gets warm (assuming from the screen on time?)
First tried cache wipe - no fix
Factory reset - no fix
Cache wipe again - no fix
Aaaand today I came into work late
Click to expand...
Click to collapse
Did your issues first start after you upgraded to lollipop?

ks-man said:
Did your issues first start after you upgraded to lollipop?
Click to expand...
Click to collapse
Definitely after the upgrade.
While on KitKat, it never happened (1 month ownership). But after upgrading to lollipop, it has happened 4 times (6 nights since lollipop).

Have you figured anything out with your situation? Woke up this morning to my backup alarm and the Yellow Sprint screen on my phone.
I guess I'll have to try another factory reset and if it still happens try and get a replacement. It just doesn't seem widespread enough of an issue to be a software bug with 5.0.1.

Very frustrated. I did another factory reset but the issue still plagues my device. It still only occurs once or twice a week but when I hear my old clock radio alarm in the morning I know when I look over I'll see the yellow frozen Sprint Spark screen. I am completely out of ideas and guess I will need to have it replaced under warranty. I'm hoping Sprint won't give me a hard time as this will be very hard to demonstrate.
It definitely appears to be a software issue as it never happened before I upgraded to Lollipop but there must be more to it or others would be complaining.
If anybody has ideas please let me know. Thanks.

Response to Note 4 Freeezing while charging
I have found that after turning the quick charge feature off the problem is not happening. Hopefully this is fixed in 5.1

I'm having the same issue even after turning quick charge off..def a lollipop bug, never experienced this on kk.

I know its not the BEST option, but after taking the update to lollipop, sometimes left over kitkat files can make the system poop out. Sometimes a factory reset will take care of the leftovers. But of course, then you have to set your phone up again
If you've tried this or plan to to, let us know the results.
(When i first took the update, my heartrate monitor sensor was always on, so i did a factory reset and it fixed my problem).

Solved with workaround!!!
I faced this "sleep of death" too after updating to Lollipop. I had to pull out the battery almost every time after charging. Very annoying! I noticed though that my phone never froze in my car while charging. Thinking about the difference I realised that I keep my phone awake in the car while charging using Macrodroid (which I love anyway to automise all kinds of things). I made a simple macro which keeps my phone awake while charging and another one that returns the phone to normal while on battery.
While charging: Trigger: Power Connected; Actions: Keep Device Awake enabled & Screen Off, Constraints: None
On Battery: Trigger: Power Disconnected; Actions: Keep Device Awake disabled & Screen Off, Constraints: None
Off course there are alternatives available to Macrodroid that should be able to do the same.
My problems are solved, with and without fast charging. I hope this will help some of you as well.

same problem here
Ive tried turning off fast charging option on the powersaving mode
And also tried the option on developer mode, the "keep device awake while charging"
And even flashing dofferent firmwares from sammobile through ODIN and installed custom roms. These options doesnt resolve the issues on freezing while charging..
I think turnong off your device while charging is the only option..
Im using note4 N910C..

Clasimodo said:
Solved with workaround!!!
I faced this "sleep of death" too after updating to Lollipop. I had to pull out the battery almost every time after charging. Very annoying! I noticed though that my phone never froze in my car while charging. Thinking about the difference I realised that I keep my phone awake in the car while charging using Macrodroid (which I love anyway to automise all kinds of things). I made a simple macro which keeps my phone awake while charging and another one that returns the phone to normal while on battery.
While charging: Trigger: Power Connected; Actions: Keep Device Awake enabled & Screen Off, Constraints: None
On Battery: Trigger: Power Disconnected; Actions: Keep Device Awake disabled & Screen Off, Constraints: None
Off course there are alternatives available to Macrodroid that should be able to do the same.
My problems are solved, with and without fast charging. I hope this will help some of you as well.
Click to expand...
Click to collapse
Thanks a lot, Mate. I'm trying your workaround now. Will report later if it works on my phone. BTW, so, are you sure it is a just a system issue? Definitely, isn't a hardware problem? Did you fix it, after your post -a month ago-, installing, for example, lollipop 5.1.1 or Cyanogenmod 12.1? I'm on 5.0.1, SimpleRom V4. Of course, mi device, N910C, is rooted.
Thanks again.

With lollipop 5.1.1 the problem is solved for me, even without this workaround.
Sent from my SM-N910F using XDA Forums PRO

I'm having similar issues as you guys. I found out that my phone will only perform normally when I charge it with my laptop USB port which I think is around 0.5amps. Anything above that, even a 1amp charger would cause the phone to freeze, reboot and turn off and not turn back on. The phone has been in repair 4 times and the problem is still there. Now every night I'm forced to charge my phone with my laptop which takes an age instead of the fast charger that came out of the box.
Currently my phone is still freezing and rebooting when I'm out and about and the only way I can get it to perform normally is when I plug it into my laptop. This normal functioning would only last whilst the phone is plugged in.

Note 4 (T-Mobile) Lag, Freeze, Crashes, Restarts.

This is my first post on this forum. I searched around here for a solution, didn't really find one matching my problem. I am not a phone wizard or anything like that either. So I'll try my best explaining my problem.
First things first:
Phone: Note 4
Model #: SM-N910T
Android Version: 5.1.1
Rom: Stock Rom
Rooted: Rooted Once and used a custom Stock T Mobile Rom Once.
Here's the ROM I used at the time: http://forum.xda-developers.com/not...10tuvu1cog2-debloated-deodexed-stock-t3175406
Recently I So recently my phone out of the blue started lagging, freezing, and restarting itself. I didn't download any applications or anything like that for it to freeze up. I was currently then on the custom ROM I have mentioned above and it was the updated version. I have tried everything to my knowledge to try and fix the problem. I have tried going back to stock T mobile ROM (currently on stock rom now) through odin and stuff. After all that, it was still lagging, freezing, and restarting etc... Ran it through safe mode and the only problem in safe mode is that the lag is gone, but the restart is still there. Running in safe mode, if I would turn the screen off and back on to unlock my phone, there would be like 40% chance that it would restart after unlocking the phone and the phone would just restart normally. Rarely, whenever my phone would attempt to restart.. I would get a "Could not boot normally" message along with couples codes below and the image of android guy. Then I would have to take my battery out and attempt to restart the phone once again.. I've wiped the cache and everything in recovery mode, nothing helps at all. Also, the phone is in perfect condition. Hasn't been dropped, cracked, no water damage, or anything like that.
This place is my only hope to fix my phone before I will go out to buy another phone from the carrier.
Thank you all for taking your time to help me

u r not alone
hi, huntitude. even i am experiencing similar issues. kindly follow this thread and update if u find any solution
http://forum.xda-developers.com/note-4/help/frustrating-problem-phone-lagging-t3336964

doctor geek said:
hi, huntitude. even i am experiencing similar issues. kindly follow this thread and update if u find any solution
http://forum.xda-developers.com/note-4/help/frustrating-problem-phone-lagging-t3336964
Click to expand...
Click to collapse
Well I already got rid of my note 4 unfortunately before anyone could help me here so I had to upgrade my phone to note 5 and return note 4. While I still had my note 4, I realized something weird. While the phone was lagging and crashing etc.. When I had it plugged in for charge it would work perfectly fine. No lag, it wouldn't freeze up or restart (had it running perfect for 7 hours). It was like my phone was brand new again. As soon as I unplugged it from the charger, few minutes in and it was back to restarting and all that. I never knew why it did that.
Anyone know why this mightve happened?

Might be the battery though

I thought that too. I tried my brothers note 4 battery for awhile and it worked for a little bit and then it started doing the same thing even on his battery. Shrugs.

Huntitude said:
I thought that too. I tried my brothers note 4 battery for awhile and it worked for a little bit and then it started doing the same thing even on his battery. Shrugs.
Click to expand...
Click to collapse
In the COH update iteration there is an annoying bug that affect fingerprint.
The bug causing the phone to restart, lagging & closing all apps randomly when the fingerprint is set.
May be this one is also the same.
Try to disable all fingerprint related settings.

d4rkkn16ht said:
In the COH update iteration there is an annoying bug that affect fingerprint.
The bug causing the phone to restart, lagging & closing all apps randomly when the fingerprint is set.
May be this one is also the same.
Try to disable all fingerprint related settings.
Click to expand...
Click to collapse
I never used finger print scanning on my Note 4. Always disabled.