yashsingh1/xdaforums huggingface dataset:
[Galaxy Note 4 Q&A, Help & Troubleshooting] Nyssa1104:
As long as it has not been opened or water damage it's always worth a try. My screen was lifting in top left corner and I thought they may think it was tampered with out of warranty by 8 months or 9 but they did it.

Go for it if you have another device to load up website to show them the problems it be in your favor.. Good luck
[Galaxy Note 4 Q&A, Help & Troubleshooting] callumbr1:
I'll try it. My note has never been water damaged or opened up. Cosmetically it's 10/10 condition. I have s8 now but I will show them on that :good: thanks for advice mate
[Galaxy Note 4 Q&A, Help & Troubleshooting] The_Mentiad:
So, as I posted before I have this problem. I have tried a lot so far. Reformatted SD card. Repartitioned. Deleted all my apps. Turned off battery optimisation for some and all off my apps as per previous suggestions.... blah blah. I haven't re-flashed yet but I have basically exhausted most of the other suggestions.

I just downloaded Kernel Adiutor and I noticed that three out of my four CPU cores were fluctuating between going offline intermittently.

My question is: is this normal?

I switched them on in the app... and the phone seems stable(r) even if I am not using wakelock, but it is early days and I haven't used it much yet.
[Galaxy Note 4 Q&A, Help & Troubleshooting] notachamp:
Yeah, still the best (or the only )way to fix that Problem.

Wake Lock App,

Partial Mode in app settings (make sure u guys have the menu button active, in some roms u have to go in to button settings )

and if you shut down the phone (try to avoid that

) and phone can't boot, well it's not dead, wait for about half hour or more and also experimenting with holding power button without battery and your phone will boot again and work great with wake lock app.

Hope this informations can help someone.
[Galaxy Note 4 Q&A, Help & Troubleshooting] The_Mentiad:
Nope. Another dead end. It is weird, the phone doesn't seem to freeze until i leave my house.
[Galaxy Note 4 Q&A, Help & Troubleshooting] Dwillian:
How do you check the read/write speed of internal memory? I would like to check mine now that it has been repaired.
[Galaxy Note 4 Q&A, Help & Troubleshooting] callumbr1:
My note 4 has completely died. No recovery, no download, no power on what so ever... nothing. Tried a brand new battery and different cables to get it to charge but nothing.

When plugged in pc its not recognised.

In pc devices its recognised as Qualcomm HS-USB

Any ideas?
[Galaxy Note 4 Q&A, Help & Troubleshooting] Note4usr:
Seems you have got into the same problem as me and looks like your phone is bricked : (

If your phone is N910F and you want to give it a try and fix it by yourself, then visit https://xdaforums.com/note-4/snapdragon-dev/note-4-debrick-img-t3488114/post69489251#post69489251

And if it is a different version then you might go to the 1st page of the link I posted. I must tell you, it requires lots of files to download from "mega.nz" and requires a lot of patience so, if you have the patience then good luck otherwise don't bother....
[Galaxy Note 4 Q&A, Help & Troubleshooting] Kuter_tm:
AndroBench from play store It wil show You read/write and it test SQL speed. Pls post Your resoults

Im now try to choice what motherboard boy F or C... before i have F meybe its time to try C

Withone is better?
[Galaxy Note 4 Q&A, Help & Troubleshooting] Dwillian:
Here's the screenshot of my read/write test to/from internal memory from my Verizon Note 4 with new motherboard:

And here's a screenshot of my read/write test to/from microSD card:
[Galaxy Note 4 Q&A, Help & Troubleshooting] Kuter_tm:
Its mine. Sorry for photo editing but its only picture i have and it was to my friend to compare cos he have note too, So dont read what i write there, its bad . :D

I think C is better. Better battery managment, better performance with android 6... so...
[Galaxy Note 4 Q&A, Help & Troubleshooting] Sp0oner:
Those who think their phones are bricked mine showed the same response, couldn't power on and no charge being taken when plugged in etc. However I left mine without the battery in it for a good 30 minutes. Then put it back together it booted went into recovery mode on its own. Pulled the battery wouldn't boot. Repeated 30 minutes with battery out then next time it booted straight up although takes quite a while, 5 minutes just displaying the Samsung splash screen but does eventually get there. Mine accidentally rebooted today after pressing the apply update by mistake. Same thing happened as it booted into tecovery mode so pulled the battery then it became a brick again. Followed the 30 minute thing as i'd done before and it was up and running. The key is never let it reboot!

---------- Post added at 09:31 PM ---------- Previous post was at 09:18 PM ----------

Do you have any paperwork showing this repair? Not because I doubt you but because i'm going to try raising this issue with Samsung UK directly. How can a service centre in London do yours for free but one in Bournemouth quote me £165 for exactly the same repair and both phones out of warranty. I will be pointing to this thread as evidence of the issue not just on 1 or 2 phones but it being a big issue with the model and it being international. Not to mention Samsung in the US repairing for $70 which is around a third of what i'm being quoted here in the UK.
[Galaxy Note 4 Q&A, Help & Troubleshooting] Sp0oner:
I've just logged an official complaint with Samsung UK and apparently I will receive a call within the next 72 hours to go through the issues.
[Galaxy Note 4 Q&A, Help & Troubleshooting] notachamp:
Exactly about 30 minutes or more waiting time and always same process even from recovety: shut down in the recovery and remove battery, don't boot from recovery into the Rom it will not work with this issue.

And of course the wake lock app (the one with a lamp symbol in store) partial mode it's a must here to keep the cpu awake.

So the removing Battery time it's importend like when you flash new roms and stuff, but don't flash anything if you have warranty, for the Note 4 i loved mostly the original Stock Rom. Now i'm using Resurrection Remix Rom it's the best android 7 rom, it's fast but still not all apps are working well and the camera lost features from samsung and got flash issues. So stay with stock MM or when someone is really crazzy about Android 7 i recomment the RR rom.
[Galaxy Note 4 Q&A, Help & Troubleshooting] j3ffr3yli:
Solutions that worked for me (Note4 - SM-N910W8)

Edit:

Sorry folks, solution #3 actually does not work - just got my first restart and some freezing issues. Will report back as I try other solutions. But solution #1 and #2 are still valid options.

Hi everyone,

Best thread ever. Seriously. I've read the entire thread and these were the solutions that I tried and worked for me (Note4 - SM-N910W8):

Solution #1: Install Wake Lock: https://play.google.com/store/apps/details?id=eu.thedarken.wl

- Enable "PARTIAL_WAKE_LOCK" (5th option) and your freezing / rebooting issues should magically disappear

- Problem with this solution is that there is a battery drain issue and it's a band-aid fix (i.e., you have to keep an app you probably don't want to have installed) to what appears to be a software issue

Solution #2: Go to Settings > Application Manager > Options (3 vertical dots at top right) > Show System Apps. Look for and click on "TouchWiz Home" > Click "Permissions" > enable "Contact" and "Storage"

- You don't need to have Wake Lock (Solution #1) enabled and your phone will stop freezing / restarting

- Problem with this solution is the camera appears to still freeze a little (especially when viewing gallery from camera app) but it will still work

Solution #3: So far the best solution that I've tried and it not only has made my phone snappier (less laggy), but also doesn't require Wake Lock to be installed. It has eliminated my freezing and rebooting issues --> Install Dummy File Generator (thank you debernardis for the solution!) Best of all, it appears this app will remove freezing / rebooting issues on other Samsung phones! Seriously this solution has given me back my sanity and 5 stars to the guys that developed the Dummy File Generator app.

See quote below for details:
[Galaxy Note 4 Q&A, Help & Troubleshooting] notachamp:
Yh i guess there's only solution 1 and 2, specially solution 1 with my post above about the battery remove and waiting.
[Galaxy Note 4 Q&A, Help & Troubleshooting] j3ffr3yli:
Hi everyone,

I have another solution that appears to be working! Just so that people who are new to this thread can keep track of all the solutions that were discussed (that seem to work), I'll include them in my replies:

New Solution #3: Flash the latest Adreno 420 Drivers Note 4.

- From the post itself it mentions, "Works In Official 6.0 or 7.0 Custom Roms In Note 4 SM-N910F, SM-N910G Or Any Snapdragon Note 4"

- I just flashed it using TWRP on my Note4 (SM-N910W8) and so far it's stable and no freezing or restarts. I'll let you know if this solutions continue to work. I'm using rooted stock ROM.

- No need to have Wake Lock activated (Solution #1) nor TouchWiz permissions enabled (Solution #2) - so far at least. I'll report back if something breaks :)

Older solutions that have worked for me:

Solution #1: Install Wake Lock: https://play.google.com/store/apps/details?id=eu.thedarken.wl

- Enable "PARTIAL_WAKE_LOCK" (5th option) and your freezing / rebooting issues should magically disappear

- Problem with this solution is that there is a battery drain issue and it's a band-aid fix (i.e., you have to keep an app you probably don't want to have installed) to what appears to be a software issue

Solution #2: Go to Settings > Application Manager > Options (3 vertical dots at top right) > Show System Apps. Look for and click on "TouchWiz Home" > Click "Permissions" > enable "Contact" and "Storage"

- You don't need to have Wake Lock (Solution #1) enabled and your phone will stop freezing / restarting

- Problem with this solution is the camera appears to still freeze a little (especially when viewing gallery from camera app) but it will still work
[Galaxy Note 4 Q&A, Help & Troubleshooting] hahn.lelo:
So I had same freezing and rebooting issues. At the beginning it worked fine with cpu awake app. But suddenly 2 or 3 weeks ago apps started crashing. 3 days ago the phone unfortunately had again the reboot issue and finally was unable to boot. By pulling the battery out for 5 min or longer it was sometimes able to boot again but 90% of the time it stayed black, booted odin mode or showed mmc read fail. Finally it was not possible to boot any more. Until then I was sure it isn't a hardware failure.

Once before I had an old radeon with a memory error. I put it in the oven for some minutes an this card was fully working again until I replaced it for a newer card 2 years later.

Due to the fact I had nothing to lose because the phone wasn't working any more I opened the phone and extracted the mainboard. I covered sensitiv parts with aluminium foil and baked it for 10 minutes at 180 °C.

After fitting all parts back it was fully working again. I uninstalled the cpu awake app and no freezes!

I will report if something new shows up!

I do not recommend to repeat this experiment concerning the risk of killing your device!
[Galaxy Note 4 Q&A, Help & Troubleshooting] Sp0oner:
Well Samsung UK are the biggest waste of time going. Trying to get a sensible conversation with customer relations you'd have more chance talking to a brick wall. Not interested whatsoever and with that attitude it's put me off buying Samsung phones ever again.

I'm not letting it drop however and will put it in writing to them so as to get a written response and will then take it up with Samsung global HQ.

---------- Post added at 12:05 PM ---------- Previous post was at 11:46 AM ----------

Oh and to make matters even more ridiculous it appears different Samsung repair centres charge considerably different prices. 1 in London just quoted me £220 for a motherboard replacement.
[Galaxy Note 4 Q&A, Help & Troubleshooting] djnunny1:
ok guys whats the options so far has anyone had a rom work? if so which one? not too fussed about being on samsungs firmware

just need this phone to stop crashing and restarting!
[Galaxy Note 4 Q&A, Help & Troubleshooting] Sp0oner:
It's a physical issue with the mainboard I can't see any rom is going to make any difference.

Out of interest at what age has everyone's phone developed this issue? Mine was just under 2.5 years as I got mine on release day.
[Galaxy Note 4 Q&A, Help & Troubleshooting] hahn.lelo:
Mine was just a bit over 2 years in use ... started this behaviour just before April ...
[Galaxy Note 4 Q&A, Help & Troubleshooting] Nyssa1104:
2.5+ years had this Note 4, defects started back in Dec 2016 to 19 June. My device factory standard nonroot etc took my one into Samsung Service Centre while in London and got new motherboard and soft buttons (recent & return) all done free of charge while I waited around..
[Galaxy Note 4 Q&A, Help & Troubleshooting] shootermc77:
i dont use Touchwiz, i use Action Launcher. I freeze Touchwiz Easy and Touchwiz Start with titanum. Since i do this, i dont have freeze or restart. Will report my expiriences.

edit: not working^^
[Galaxy Note 4 Q&A, Help & Troubleshooting] notachamp:
Well like you see my previous post i'm using resurrection remix rom. My phone started to act crazzy before 3 months and i got it maybe 1 year and some months, i lost the warranty cuz flashing custom rom. But yh since i'm using wake lock and that rom and the removing battery trick and waiting half hour or more, when i shut down my phone, my phone works well i try to not shut it down alot so i don't have to remove battery and wait always. Yh that made me little sad collecting money for a good phone and then loosing warrenty so easy even if it's a hardware issue from samsung, but for now my phone seems to work with that rom and wake lock app over 3 months soon. I'm using the same bootloader and modem as my stockrom and the emotion kernel.

And i installed my rom first without gapps, so my phone startet easy then i installed gapps later in twrp recovery and installed wake lock from the playstore.

Edit: installed "wake lock" from the playstore*
[Galaxy Note 4 Q&A, Help & Troubleshooting] cyber-junkie:
Same here on my german (not rooted) Note4 SM-N910F...

the battery is getting hot - phone freezes after 1-2 minutes and restarts...

All postet solutions are without success.

With an ice-pack (watch out to keep it dry!!!) under the phone I was able to backup all my data :D

Facory reset works - but after a few minutes the same problem.

And I found the reason: It's the last update of the "Android System WebView"!!

When the update is installed there seems to be no way to uninstall it! Deactivating it to deinstall updates is without success.

My temporary solution:

- Factory reset

- Disable automatic playstore updates

- Don't install the shown update of the Android System WebView

Until now I havn't found a way to disable only the update for the Android System WebView - and don't found a fix for it :(
[Galaxy Note 4 Q&A, Help & Troubleshooting] notachamp:
I remember i used Anfroid System Webview update too before i got that issue and tested some browser games. So thats good information. But yh like i said in my previous post with that rom, wakelock and even Android Webview i installed on that ( yh maybe i should delete it) my phone works since 3 months without freezing, only some apps, but that's because of the rom, are crashing sometines. With Chrome or Youtube i never had any problems.

Edit: i've just uninstalled webiew in this rom, it was even not preinstalled, i don't feel like i really need it. Lol
[Galaxy Note 4 Q&A, Help & Troubleshooting] cyber-junkie:
Now I have deactivated "Android System WebView" - before my Note4 tried to update it... all seems fine, no crashs, no hot battery, no reboots - but a few apps won't work (apps that are using the internal webviewer).

So this should be only a temporary solution :( - I hope the Sytem WebView gets an update soon.
[Galaxy Note 4 Q&A, Help & Troubleshooting] notachamp:
I guess will install the super-giga-mega-magic app android webviewer again :D because now my apps freezing more and the whole phone first time shut down even with wakelock. I hope really that my phone will liv again or i will always dirty flash same android 7 rom with trwp recovery. I loved the stock rom, it's just the best, best gallery, full working camera with all features, but ill keep using the custom, because it gave my phone life again with the wakelock app and the removing battery trick some minutes always before booting.
[Galaxy Note 4 Q&A, Help & Troubleshooting] j3ffr3yli:
Stock rom still works without crashing and freezing if you install Wakelock on it. I'm on stock rom and experiencing no crashes or restarts since installing Wakelock. Truth is, this is so far the only solution that works.
[Galaxy Note 4 Q&A, Help & Troubleshooting] pwannell:
I have exactly the same issue. Flashed ota to marshmallow and got an emmc read fail error. Got marshmallow installed now constant freezing, rebooting, can't unlock phone. Can't use fingerprint lock as phone keeps semi thinking it's rebooted when it hasn't and asks for security password.

Brick throw river me thinks at the moment.
[Galaxy Note 4 Q&A, Help & Troubleshooting] j_hansen:
Mine have started freezing up randomly as well, it was fine after the update to MM but after another update a week ago it started freezing
[Galaxy Note 4 Q&A, Help & Troubleshooting] Stryker_Echo9er:
I faced similar problems and was bored using the phone after almost 1.5 years. I sold it and m now waiting for the Note 7!
[Galaxy Note 4 Q&A, Help & Troubleshooting] atrohde:
Same problem here. ODIN updated to Marshmallow. Ever since can't get it to stay booted. It seems as if once it heats up it will just boot loop. Like the thermal threshold has been permanently lowered. I've tried flashing back to 5.1.1 and also cyanogenmod but the problem still exists. Doesn't seem to be a hardware issue as the phone will work fine for a few minutes initially when cold.
[Galaxy Note 4 Q&A, Help & Troubleshooting] yugoport:
Mine (a 910F) started rebooting yesterday, but it has been showing a strange behavior as it has been freezing for a few seconds sometime now.

I am stock rooted with twrp, will try to factory reset to see how it goes, but after seeing all the posts here I start to think that this might be a hardware issue.

Enviado do meu SM-N910F através de Tapatalk
[Galaxy Note 4 Q&A, Help & Troubleshooting] DionWhite33:
After the marshmallow update I've yet to have any of the force close reboots and camera problems that I previously had
[Galaxy Note 4 Q&A, Help & Troubleshooting] lnvincible:
Same here... :(
[Galaxy Note 4 Q&A, Help & Troubleshooting] chrisV10:
Same issue with a SM-910A

I have this Note 4 form At&T apparently it was working as needed but i have sold it a few weeks ago, but the customer return it to me, saying it freezes and restarts and heat up... so i proceed with the retunr, at the begining i use it without problems at all, but after installed my SIM the issue began. since then, the phone freezes at lock screen and restarts a lot.

So i proceed wiping everything from recovery, and install it the 5.1.1 ( it had the 5.0.1) and is working now, but sometimes while using it, it freezes and after a little while it go on, and sometimes restarts, this is happening les that before, but the issue persist.

I dont know if the customer tried to root it and soft bricked it..... and maybe he did... if someone know any kind of solution i will appreciate if share it here to keep trying.. :laugh::good:
[Galaxy Note 4 Q&A, Help & Troubleshooting] DeXTeRrR:
My phone doing the same.

Someone have found solution?
[Galaxy Note 4 Q&A, Help & Troubleshooting] signedupjusttosaythanks:
sim card was the culprit

The issue I've been having with my Samsung Note 4 lagging, freezing and then crashing started happening over night... I don't have an SD card in the phone and it only started happening after I installed pokemon go. I since deleted the app but the issue kept occurring. I did every troubleshooting method I saw on google and have factory wiped my phone 3 times in the last 4 days. It would loop the boot options screen and every 4th or so reboot, id get the little android guy on the screen with the message "Downloading target...blah". Hold down the Volume down, home and lock at the same time to get out and back to the boot options...so I wipe the phone. Boot the phone in safe mode and it was better but not perfect.

Came across this post today and soon as I took the sim card out, the phone started working like magic! I could open whatsapp without the phone having a seizure. The touch responded well, etc. Went to the store and got a new sim card and everything is working like a dream again. Had to create an account just to post this and say thanks! Highly recommend this fix for anyone experiencing freezing/crashing/rebooting with their Note4 or any other Android device being affected by these symptoms. Thanks again!
[Galaxy Note 4 Q&A, Help & Troubleshooting] golden_m:
in my case things are much worse.

out of nowhere the phone started to freeze a lot, after a day of constant freezing it started to reboot on it's own. no patter whatsoever.

i was sitting at my computer and phone was on the table with no activity, rebooted maybe 5-6 times in an hour.

it is getting worse and worse by hour, now having hard time even turning it on, it is not rebooting but shuts off.

Safe mode did not help, wiped the device, issue persists, no media card, SIM card removal does not help much either...

pretty much out of options, will probably need to get a replacement soon, but after this horror story and experiences of others i doubt it will be another Note...
[Galaxy Note 4 Q&A, Help & Troubleshooting] cehajjic:
I have same problem.. I reflashed phone 2-3 times with official rom, downgraded to 5.1.1 but always same.. when I try to downgrade to 5.0 or 4.4 it showing error emmc read fail.. is there any solution yet for this model..

Thank you

Poslano sa mog HTC One_M8 dual sim koristeći Tapatalk
[Galaxy Note 4 Q&A, Help & Troubleshooting] golden_m:
okay, found something interesting, couldn't believe but decided to give it a try...and it worked!

i cannot find original thread with this advise, do not give me any credit for this.

install Wake Lock application from Google Play, set it to "Partial_wake_lock" and set it to #4.

make sure you add it to autostart and Voilà - haven't had single restart or freezing since yesterday morning, i even called the insurance company to cancel replacement device!
[Galaxy Note 4 Q&A, Help & Troubleshooting] iamfoesho:
Since this APP fixes the issue, is it a hardware or software issue with kernel?
[Galaxy Note 4 Q&A, Help & Troubleshooting] cehajjic:
I don't think that app can fix the problem. I installed also and have problem again..
[Galaxy Note 4 Q&A, Help & Troubleshooting] golden_m:
mine is working 3rd day with no single hiccup!

not sure what is wrong with your device but mine works just as good as before the issue appeared.
[Galaxy Note 4 Q&A, Help & Troubleshooting] cehajjic:
So this solve your problem ?

Just to check am I right..
[Galaxy Note 4 Q&A, Help & Troubleshooting] 121man:
Just fixed mine too guys, I mean the Partial Wake Lock app. Does wonders. Thanks
[Galaxy Note 4 Q&A, Help & Troubleshooting] nzengh:
that seemed to work for me for a few days but now again the phone shuts down by itself every time within few seconds.
[Galaxy Note 4 Q&A, Help & Troubleshooting] golden_m:
yes, that is the setting.
[Galaxy Note 4 Q&A, Help & Troubleshooting] laur033:
I wont do that in your situation. I bought recently a S7 edge and it has the same problem... Booting itself every now and then. I have factory reset it, clear all the cache, but the problem still persists. ( First time freeze and after 4-5 seconds it's just rebooting)
[Galaxy Note 4 Q&A, Help & Troubleshooting] mmmdah:
Thank you, this worked.