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Galaxy Note 4 boot issues after installing Android updates, other issues

As promised, here’s another material that tackles some reported issues about the #GalaxyNote4. By today’s standard, the Note 4 is already nearing its eventual demise (the normal operating lifespan of today’s phones is two years). With the unfortunate fate of the Galaxy Note 7 a few weeks back, millions of Note 4 and Note 5 users may have to stretch their usage of their Note devices a little further. That said, we will be expecting more reports about all sorts of issues in the coming months for both Note 4 and Note 5.

In the meantime, below are the specific topics that we cover in this article today:

  1. Galaxy Note 4 Sync function causing camera to crash
  2. Galaxy Note 4 keeps rebooting randomly
  3. Galaxy Note 4 boot issues after installing Android updates
  4. Galaxy Note 4 stuck in bootloop after an update
  5. Galaxy Note 4 roaming service not working
  6. Galaxy Note 4 “Unfortunately, system UI has stopped” error when trying to do screenshot | Galaxy Note 4 “Unfortunately, phone has stopped” during calls

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.

When describing your issue, please be as detailed as possible so we can easily pinpoint a relevant solution. If you can, kindly include the exact error messages you are getting to give us an idea where to start. If you have already tried some troubleshooting steps before emailing us, make sure to mention them so we can skip them in our answers.

Problem #1: Galaxy Note 4 Sync function causing camera to crash

Have some input for you regarding the Camera Crash issue with the Note 4. Mine started doing it today. I would no sooner take a picture than the phone would crash and reboot, always successfully. So I started chasing it down and ran into your pages. Your recommendations to replace the battery or reset seemed a bit extreme for openers. I puzzled about this awhile and decided to check into the syncing of pictures to OneDrive. Checked the device setting and it said OFF. OK, I thought, that’s what I want. A bit later I had to try another picture. I snapped two quick pics and exited Camera before it crashed. Went to my development system and notice that the pictures had already synched to OneDrive. Shouldn’t be, I thought. This time I opened the OneDrive app itself on the phone, went to its settings and, sure enough, it was autosynching. Turned it OFF. No problem since. The multiple, successive crashes happen, I believe, because the phone tries to continue synching before the new WiFi connection is established on boot-up. Just a guess. Also, I think data is getting corrupted on the half-sent pictures on the crashes. The battery may also be contributing to this, as I’ve notice this unexpected crash behavior totally unrelated to the camera app when the battery now gets down to the 20-25% level. The phone is about 18 months old. Will now replace it just to eliminate it as a continuing factor. Anyway, thought you should take this into consideration before other measures are taken. My camera app is no longer crashing. Check Sync. — Jerry

Solution: Hi Jerry. Thanks for letting us know your self discovered solution for this issue. Majority of the time, knowing the real cause for an Android issue can be a tricky business, especially if it involves the software. We’re glad that you’ve managed to fix your particular issue and shared your solution with us. We’ll surely use your workaround should we address a similar issue from other users in the future.

Problem #2: Galaxy Note 4 keeps rebooting randomly

Hi guys. I hope you can help me for it has been several weeks troubleshooting and I still do not get it. I am with Samsung Note 4, unrooted, and I am not sure of the version (last updated on its own). My Samsung Note 4 (unrooted) was fine and then it started rebooting, sometimes, without a reason. Then it would sometimes freeze for a while without a reason. Then freezing became more annoying and I’d need to remove the battery to start it again. Then once it did not start at all anymore, I’d need to play with charging, removing battery, etc.

What I have done to try fix it:

  • I cleaned the USB connector, which enabled me to charge the battery again.
  • I removed the SD card.
  • I wiped cache.
  • I bought a new battery. The funny thing is now, when I turn it off, it does not start again. I remove the battery, press the power button for a while to drain it out, put the other battery, and sometimes it starts. So it seems both batteries are kind of OK but I need to play until any of them works.
  • I did a factory reset. However, it seems it started to download some apps from before, which I stopped when I saw it. However, I still have some freezing and that happens during incoming calls: the phone does not react, I miss the call.

Now when I managed to start it again, I get this “could not do normal boot. mmc_read fail. What the hell may be happening? Thanks for hints. — Agnes

Solution: Hi Agnes. Random reboot issue can be caused by a number of factors, with some of them beyond an average user’s ability to resolve. Based on your problem description, it’s apparent that you’ve tried almost everything that a user can do. This means that the problem may be more serious that it usually is, that is, the problem may lie on the hardware. Before you consider sending the phone for a general hardware check to Samsung or a third party shop, you can try two more things — another round of factory reset and flashing a stock firmware. The main purpose of the second factory reset is to double check if the issue can be fixed on the software level. Once you’ve factory reset the device, make sure to observe it for at least a day without installing any app. If the issue persist even when the software is on pristine condition, the next thing that you want to do replace the existing operating with another version of Android. Try to check if downgrading to, say, Lollipop will help. If both of these procedures won’t improve the situation, find a way to have the phone repaired replaced.

Problem #3: Galaxy Note 4 boot issues after installing Android updates

We have 2 Samsung Note 4’s that we just did the new updates on. Now mine runs slow and my husband’s is not working. It kept coming up with a screen (one I have never seen) saying it was downloading with a bunch of very small print in upper left hand corner. I took the battery out twice and then it worked for a little while then was doing the download thing again. Now it won’t turn on even after removing battery a couple of times. Was going to wipe the cache partition but can’t get it to turn on so I can’t. I wiped the cache partition on mine and it seems a little better. The phones are almost 2 years old. Is that about all they are good for. Thinking of going to an iPhone. We are older and our boys are pointing us in that direction? — Brenda

Solution: Hi Brenda. If you did not modify the software of your phones in any way (by rooting or flashing/installing unofficial operating system), then doing a factory reset may help your phone turn back on normally. To do that, follow these steps:

  • 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 Volume 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.

Keep in mind that the above steps will erase everything that’s stored in the phone’s internal storage (but will not touch the SD card). If you can’t boot the phone normally, thus, you’ll be unable to create a backup of your files, there may be no way to recover them after a factory reset.

For the phone that won’t even turn on, try to check if you can boot it to another boot mode. Follow the steps below:

Boot in Recovery mode:

  • Charge the phone for at least 30 minutes.
  • Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  • When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  • When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  • Using the Volume Down key, navigate through the options and highlight ‘wipe cache partition.’
  • You can either wipe the cache partition or do a factory reset when in this mode.

Boot in Download Mode:

  • Charge the phone for at least 30 minutes.
  • Press and then hold the Home and Volume DOWN keys, then press and hold the Power key.
  • When the Samsung Galaxy S7 shows on the screen, release the Power key but continue holding the Home and Volume DOWN keys.
  • Wait until the Download screen appears.
  • If you can boot the phone in download mode but not in other modes, that means that your only way out may be to flash a stock or custom firmware.
  • Use Google to look for a guide on how to do it.

Boot in safe mode:

  • Charge the phone for at least 30 minutes.
  • Press and hold the Power button.
  • Once the ‘Samsung Galaxy S7’ logo appears, release the Power key and immediately press and hold the Volume Down button.
  • Continue holding the button until the phone finishes rebooting.
  • Once you see the text “Safe mode” at the bottom left corner of the screen, release the Volume Down button.
  • The only difference of safe mode from normal mode is that the former prevents third party apps from running. If you can boot the phone in safe mode but not in normal mode, uninstall all apps until the issue (that prevents you from booting normally) is eliminated.

Problem #4: Galaxy Note 4 stuck in bootloop after an update

Hello IT specialist. Recently after my Note 4 got upgraded, my phone will go into auto reboot loop when I open my default camera app. It has gotten worst and more frequent and till the point that my phone needs to be constantly charged to let the phone survive. However I strongly do not think is the battery’s issue. I have also tried clearing cache partition and also done a factory reset. However it doesn’t solve the issue at all. For now, once I unplug the electrical source despite having a full charge or maybe 80%, the phone will go into a auto reboot loop again and again. If I take out my stylus pen, it will do that do Opening Google Maps will do that too. Even if do not touch it, sometimes the phone will go on to a reboot loop again. Any idea what can I do about my phone? I have gotten my phone back in Singapore, however I’m residing in the United States for a period of time (the update occurred during my stay in the States). Please help! I just need my Note 4 to survive another 4 more months before I’m back in SG. — Kristine

Solution: Hi Kristine. Many Android users are quick to install any available Android update but may not be as fast to update apps. Some post-update issues can be caused by incompatible apps so we recommend that you do another round of factory reset and observe how the phone behaves when there are no third party apps in the system. In other words, you must restore all software settings back to default again and let it run for some time. Make sure that you don’t add, download, or install anything during the observation period. If your phone will continue to reboot on its own in this state, an unknown hardware issue must be causing it. On the other hand, if the issue is absent during the observation period, that’s a sign that you have a bad app installed. Since there’s no way for us to know what that app is, you must install apps individually so you can observe the phone for some time before you install the next one.

Random reboot issue may also be a sign of a malfunctioning hardware so don’t hesitate to contact Samsung or any relevant party (carrier or retailer) for a replacement.

Problem #5: Galaxy Note 4 roaming service not working

Hi. I’m using a Note 4 N910P version in Mumbai, India having purchased it from eBay. I’m sure that I have received a rooted device (since Pokemon Go won’t play on my phone anymore). Now the problem is that mobile data works fine in my city but as soon as I’m on roaming, data doesn’t work. The option which is there in mobile data settings to select data roaming, automatically deselects itself as soon as I’m on roaming. Even if I select it again while on roaming, later I get an error which says – phone has lost data connectivity because I didn’t select data roaming before leaving home network. Your suggestions will be highly appreciated. Thanks. — Saqib

Solution: Hi Saqib. We don’t usually support issues if a device is running unofficial software or rooted. The thing with rooted phones is that problems may be caused by something specific to the running unknown software. It’s possible that there may be an app or operating system restriction that’s preventing roaming service to work. There’s just no way for us know what’s wrong with your system. Contact your carrier so they can give you direct assistance regarding the issue.

Problem #6: Galaxy Note 4 “Unfortunately, system UI has stopped” error when trying to do screenshot | Galaxy Note 4 “Unfortunately, phone has stopped” during calls

I have a refurbished Note 4, and it has increasingly given me trouble. I have two immediate issues. The phone hasn’t been rooted either.

  1. When I try to take a screenshot, using the home and power button, I get this message: “Unfortunately, system UI has stopped.” The only solutions I’ve seen are to factory reset the phone. I don’t want to do this.
  2. Whenever someone calls me, I get this message: “Unfortunately, phone has stopped.” I press okay over and over and it doesn’t go away. I have to eventually restart the phone in between pressing okay in the error box. Please if you could give me insight in how to fix these problems, that would be great. I can’t afford a new phone! — Daniel

Solution: Hi Daniel. There are at least three ways to capture a screenshot on the Galaxy Note 4:

  1. by pressing Power and Home buttons,
  2. by swiping across the screen,
  3. by using the S Pen.

To capture a screen via swipe, make sure to enable this function first under “Motion and gestures” menu in the Settings app. Once it’s enabled, simply swipe across the screen whenever you want to do a screenshot.

To screenshot via S Pen, follow these steps:

  • Undock the S Pen from your Galaxy Note 4. (If the Air Command menu wheel doesn’t immediately appear, hover over the screen and press the button on your S Pen.)
  • Using the S Pen, select “Screen Write” from the Air Command menu, as in the photo above.
  • Your Galaxy Note 4 will capture an image of whatever’s on-screen, allowing you to draw or write on top of it using the S Pen.

If all these procedures will result to the “Unfortunately, system UI has stopped” error, try wiping the cache partition. 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 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 system cache won’t help, do a factory reset. This should fix both issues.


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