Galaxy Note 4 lag and apps problems after an update, other problems

Note 4 freezing issue

The #GalaxyNote4 is a great Android device, no doubt, and it has proven itself over the years. Sporting amazing hardware during it’s release, the Note 4 continues to amaze users even now. Just like any other electronics though, the Note 4 is not perfect and still suffers hiccups from time to time. Below are some of the reported problems we gathered from our readers:

  1. Galaxy Note 4 fingerprint scanner not working properly
  2. Galaxy Note 4 black and white screen issue
  3. Galaxy Note 4 can’t open two owned apps after an update
  4. Galaxy Note 4 not recognizing SD card
  5. Galaxy Note 4 lag and apps problems after an update
  6. Galaxy Note 4 battery drain, overheating, and slow performance problems

If you are looking for solutions to your own #Android issue, you can contact us by using the link provided at the bottom of this page, or you can install our free app from Google Play Store.


Problem #1: Galaxy Note 4 fingerprint scanner not working properly

Hello. I have a Galaxy Note 4 and have been experiencing a specific issue involving the fingerprint scanner. My phone had previously been secured with my fingerprint ever since I bought it but just recently stopped showing up on my lock screen and instead automatically defaults to swipe to unlock. When I go to the lock screen settings it still says it is secured with fingerprints. I have tried changing the security and changing it back to fingerprint but when I lock the phone it still says swipe to unlock. When I reset the phone it will allow me to use my fingerprint upon initial startup but won’t if the phone is locked after that. I have also tried clearing my system cache as well as force stopping the fingerprint application and the issue remains.  Any insight on this would be helpful. Thanks. — Jacob

Solution: Hi Jacob. The only issue we encounter with phones using fingerprint scanner is the sensor’s failure to recognize fingerprints. Your case may only be happening on your Note 4. Try booting in safe mode before testing the scanner again. Booting Galaxy Note 4 in safe mode will temporarily disable all third-party or download apps leaving pre-installed ones and core services running. This procedure can help you determine if one of your apps is causing a problem. Here are the steps on how to boot in safe mode:

  • Turn off the phone completely.
  • Press and hold the Power key and the Volume Down key.
  • When the phone starts to boot, release the Power key but continue holding the Volume Down key until the phone finished restarting.
  • Safe mode will be display at the lower left corner; you may release the Volume Down key now.

Problem #2: Galaxy Note 4 black and white screen issue

Hey guys! My Note 4 worked fine during the day, then while i was sleeping it turned off, i tried to turn it on receiving no response from it, took out the battery, put it back in, it turned on, getting stuck in the Samsung logo then pixelated, showing green and red dots around the logo. Again, i took out the battery, turned the phone on, now getting half of the screen black and the other end white.

I also, tried to enter to safe mode or recovery mode, without success. In the year, i’ve been with this phone, it haven’t been dropped or suffered any damage. Let me know what could be, if it’s hardware or software related.

Thanks in advance. — Damian

Solution: Hi Damian. Looks like you have a hardware problem at hand here. The display assembly is composed of three major components — the digitizer, the LCD, and digitizer flex cable. Any damage on any of these components can render the display useless and the only way to check their condition is by checking the phone physically. Kindly bring the phone to your local repair shop to have it repaired.

Problem #3: Galaxy Note 4 can’t open two owned apps after an update

I allowed the Samsung update last Friday and after that I have two programs, which I have used without issue for 6 or more months, that won’t open or get error codes now.

When I click on the icon I get: Internal Service Failure  An internal error occurred. This can be caused by a lack of network connectivity.  Please make sure you have a good network connection.

Then it says:  App Not Owned  You do not own this app. Would you like to see more details.  After this notice comes up it kills the program.

I own both programs and have never had issues until after the last Samsung update. — John

Solution: Hi John. First, make sure that you wipe the phone’s cache partition. The cache partition is a directory where Android save files used for apps to run smoother and faster. If you’ve noticed, apps usually load slower during the first time you run it since installation. But the next time you open it, it would be faster and even smoother. Of course, not everybody can notice that. This procedure will delete system files stored in the cache partition but won’t affect data stored in the primary storage device and SD card. This is how it’s done on the Note 4:

  • Turn off the Galaxy Note 4 completely.
  • Press and hold the Volume Up and the Home keys together, then press and hold the Power key.
  • When the Note 4 vibrates, release both the Home and Power keys but continue holding the Volume Up key.
  • When the Android System Recovery shows on the screen, release the Volume Up key.
  • Using the Volume Down key, highlight the option ‘wipe cache partition’ and press the Power key to select it.
  • When the wiping of the cache partition is finished, highlight ‘Reboot system now’ and hit the power key.

If refreshing the cache won’t help, try to do a master reset. Here’s how:

  • Turn off the Galaxy Note 4 completely.
  • Press and hold the Volume Up and the Home keys together, then press and hold the Power key.
  • When the Note 4 vibrates, release both the Home and Power keys but continue holding the Volume Up key.
  • When the Android System Recovery shows on the screen, release the Vol Up key.
  • Using the Volume Down key, highlight ‘wipe data / factory reset’ and press the Power key to select it.
  • Now highlight ‘Yes — delete all user data’ using the Vol Down key and press the Power key to begin the reset.
  • When the master reset is complete, highlight ‘Reboot system now’ and hit the Power key.
  • The Note 4 will restart but it will be longer than usual. When it reaches the Home screen, then begin your setup.

Problem #4: Galaxy Note 4 not recognizing SD card

I had an old memory 32 GB memory card that all of a sudden stopped working. It gave me multiple errors that it recommended reformatting the memory card which I didn’t do because I have pictures of my father that passed away last year, but the second code the or message was saying that memory card has become un mounted which it hadn’t.  So I went again and bought me a new 64 Gb Sandisk Pixtor memory card but my phone does not pick it up at all it doesn’t even give me the option of mounting the SD Card. I’ve tried taking out the battery and resetting the phone but I have not done a factory reset or anything of that nature just yet. — Abel

Solution: Hi Abel. If your phone no longer recognizes any inserted SD card, the problem may lie in the SD card slot. The thing is, this problem can only by fixed by replacing the slot itself. If you don’t want to replace the slot yourself, we recommend that you let a professional do it for you.

We’ve also encountered some cases before wherein a firmware glitch caused the phone to malfunction and not read SIM cards and SD cards properly. To see if there’s a problem with your phone’s software, you must do a factory reset. Please refer to the steps provided above on how to do it.

Problem #5: Galaxy Note 4 lag and apps problems after an update

Over the past couple weeks I have been having crazy issues with my phone. It all started with my keyboard lagging. I did a factory reset and it started working fine but then my calling feature became laggy. Soon as I upgraded to the latest update the phone calling lagging was crazier to the point I would hang up and it would pop up back calling the person.

I contacted the Samsung help and they tried to make me clear the cache but once I got to the red triangle screen and tried to get to the other boot menu the phone would just turn back on. I did a factory reset again it still didn’t work so I found something that said go to apps and delete the cache in app and restart and it worked.

Today out the blue, I’m not getting any sound. The microphone is not working either. The phone is also not recognizing the headphones and I’m back to the crashing when I try to make out a call.

Oh I can’t receive calls either. Please help :(I’ve reset twice and I’ve also deleted the cache and data using the app menu and nothing still doesn’t work. I can only text. — Tiffany

Solution: Hi Tiffany. We suggest that you boot your phone in safe mode for at least 24 hours so that no third party apps can run while observing it. All the basic functions like calling and texting should still work so if a third party application is to blame, the issue won’t occur while in safe mode. Please refer to the steps above on how to boot in safe mode.

Alternatively, you can do another round of factory reset and observe the phone for 24 hours without installing any app. This will ensure that the phone’s firmware is fresh and free from any conflict from a third party app. It is important that you don’t install anything during the observation period to help you narrow down the cause.

As you can see, both procedures are not solutions but rather methods to help you figure the source of the problems. If the issues fail to occur after doing any of them, that’s a confirmation that one of your apps is to blame. You have to uninstall apps until you have eliminated the issues.

Problem #6: Galaxy Note 4 battery drain, overheating, and slow performance problems

Roughly two months my Galaxy Note 4 has began to overheat and the battery to discharge too fast. After a time it has began to reset and become slow (especially when opening programs). I had bought a new battery and made a Hard Reset, not restoring the backup Gmail or Samsung. In other words, it was like it came from the factory. After this procedure the problem has persisted.

Currently it is working under stock ROM 5.1.1, not rooted.

Hence, through the bootloader, I ran a factory wipe and cache wipe and again not restored the backup system avoiding to import some “junk”. I was careful to remove the chip and the card (which was not reinserted), and remove background apps from the home screen, such as clock, and turn off 3G and Wi-Fi.

In the first moments it had worked without problems, but when I enabled 3G to gradually upgrade and install the applications, the issue came up again. The first application to be installed was the WhatsApp. But also I tried this procedure first installing Swype keyboard and the problem occurred, so I could not associate the problem to a specific application.

The fact is that even after these procedures the problem persists. I’m barely managing to use it in view at all times lock and reboot, or even be frozen for minutes before unlocking, whenever I try to open a new application.

After enabling some attributes in Developer Options in the About Device menu, I could retrieve the following error messages:

“Unified Daemon is not responding”

“IU of syst. is not answering”

Among some other specific applications

I have seen this problem to freeze the opening of applications on desktops with little swap memory. But there seems to be the problem since I am taking up only 184MB of cache.

There are moments when I can open applications and perform processes for some more time before locking. At other times, then hangs start and just taking the battery and restarting to go back to work.

I has turned on in Safe Mode but it seems that problem persists. — Andre

Solution: Hi Andre. If the issue is software-related, it should have already been fixed by doing a factory reset. An app-caused problem should also fail to occur when in safe mode but it looks like that’s not the case.

Persistent overheating and fast battery drain issues can also be symptoms of a motherboard problem. We know that you have done almost everything in your power already (like using another battery or doing the software solutions) so there’s high likelihood that the problem is caused by something that you cannot fixed. Based on your problem description, it looks like you haven’t actually addressed the problem because nothing changes after doing all the stuff you did.

We recommend that you consider a general hardware checkup, or even a motherboard replacement if the symptoms continue.


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If you are one of the users who encounters a problem with your device, let us know. We offer solutions for Android-related problems for free so if you have an issue with your Android device, simply fill in the short questionnaire in this link and we will try to publish our answers in the next posts. We cannot guarantee a quick response so if your issue is time sensitive, please find another way to resolve your problem. 

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One Reply to “Galaxy Note 4 lag and apps problems after an update, other problems”

  1. Hey guys after an update couple weeks ago, I notice when I attempt to unlock the phone with finger print scan of back up password it don’t recognize my command to unlock, when I restarts it works couple times then go back to not recognizing my finger print or backup unlock, what is causing this

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