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Galaxy Note 4 keeps saying lock screen is needed, messaging apps keep crashing, other issues

Hello Android fans! Welcome to another #GalaxyNote4 post. We’re bringing you 9 more issues about the Note 4 in this post so we hope it’ll be helpful for you.

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.

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.

Below are specific topics we’re bringing for you today:

Problem 1: Galaxy Note 4 turning off randomly

So I have the Samsung Galaxy Note 4 and recently it’s been turning off randomly. And I would have to take out the battery and reset it by holding down the power button for a while and putting it back in. This usually takes a lot of tries before it starts powering on again. I have been suggested to do a factory reset but I am afraid to lose all my message data and I don’t know how to back up the messages. I have also been suggested to do a software update which I’m currently doing but it has been showing 55% completed for the last hour without any improvement. What do you suggest I should do? — Spoorthi

Solution: Hi Spoorthi. If your Note 4 has been around (at least 2 years old), you should seriously consider getting a new battery if you don’t want to do a factory reset first. We don’t suggest testing a new battery without doing a factory reset but since you don’t want to do that, using a different battery should be the priority.  If a new battery won’t fix the problem, back your files up using Samsung Smart Switch before performing a factory reset.

For reference, here’s how it’s done:

  1. Create a backup of your important files such as photos, videos, contacts etc. You can use Smart Switch for this task.
  2. Turn off the Galaxy Note 4 completely.
  3. Press and hold the Volume Up and the Home keys together, then press and hold the Power key.
  4. When the Note 4 vibrates, release both the Home and Power keys but continue holding the Volume Up key.
  5. When the Android System Recovery shows on the screen, release the Vol Up key.
  6. Using the Volume Down key, highlight ‘wipe data / factory reset’ and press the Power key to select it.
  7. Now highlight ‘Yes — delete all user data’ using the Vol Down key and press the Power key to begin the reset.
  8. When the master reset is complete, highlight ‘Reboot system now’ and hit the Power key.
  9. The Note 4 will restart but it will be longer than usual. When it reaches the Home screen, then begin your setup.

If a factory reset won’t help either, have the phone repaired or replaced.

Problem 2: Tips to minimize Galaxy Note 4 battery drain

Serious battery drain on both my Note 4 phones. Have changed to new OEM and Duran all batteries. Done everything including factory reset. Problem continues to get worse. Just played 30 min of PVZ2 and sucked 40%, for example. Phone will crash at ~40% Plug in and may read 0 to 60% instantly. Many reports of similar problem. Likely software or update or configuration issue? Thanks. — Don

Solution: Hi Don. If battery drain issue persists even after using brand new official battery, that should tell you something — that it’s your lifestyle and usage habits causing it. You should introduce drastic changes to how you use your phone and reduce the number of your apps significantly to fix the problem.

Below are some of the things that you can try:

Minimize apps that drain the battery. Knowing apps and services that cause battery drain issue in your phone is simple. You don’t need to install another third party app (which can only aggravate the issue) to do it. Just go under Settings>Battery or Settings>Device management>Battery and see what are the top apps that consume battery power most of the time. If you see an app high up on the list consuming a huge amount of battery even if you’re not using it often, you should uninstall it. Some expected services like Android OS or screen will be among the top battery consumer in this list so you should also consider tweaking them or modifying your usage habits to address the issue.

Change screen brightness level. High display setting is usually the primary cause of battery drain in most phones so we recommend that you put screen brightness to the lowest possible level that’s comfortable for you.

We also suggest that you set screen timeout setting to the lowest possible interval so the system can dim the screen if its idle.

Lower screen resolution. Like lowering screen brightness, changing screen resolution (to a slightly bigger one) of an Android device can help in minimizing battery drain. If your Note 4 is rooted, you should be able to change the resolution by installing an app that can do this task, or by editing the build.prop file. This trick requires more advanced steps so if you don’t want to modify the official software of your phone, simply ignore this suggestion.

Use power saving modes. If you regularly need longer battery life in a day, make sure to use the power saving modes in your device. Sure, you won’t be able to use advanced features on your phone but they can still come in handy if you only want to use the device for SMS and voice calling.

Uninstall apps. Keep in mind that the more apps you install, the more complicated the entire system becomes. The operating system will also take longer to load and process every task at hand, causing the entire processing mechanism of the device to take a lot longer to work. We strongly recommend that you keep the number of apps as low as possible. Remove ones that you don’t need. Games should go first. We know it can be difficult, especially if you rely on your phone for entertainment on the go but a lot of games are problematic when it minimizing battery power. Some apps like social networking apps and messaging apps constantly talk to remote servers to get the latest updates called polling so you want to make sure that you minimize or remove them as well. Although Google encourages developers to make their apps disable background service updates when there’s no internet connection, not everyone complies. This means that some apps may continue to run in the background waiting for updates. Unfortunately, an end user like you won’t have a clue at all which app is good or not. Even official apps like Facebook and Facebook Messenger is a notorious abuser. Needless to say, the fewer the apps you install, the better it is for the battery’s health.

Recalibrate the battery. Sometimes, Android loses the ability to track battery levels correctly so helping it do its job may pay off. Here’s how to do it:

  1. Use the phone by playing games or doing tasks to hasten power discharge, until the phone turns itself off.
  2. Turn the phone on again and let it turn itself off.
  3. Charge the phone without turning it back on.
  4. Wait until the battery says it fully charged to 100%
  5. Unplug the charger and turn the phone on.
  6. If the phone says it’s not 100% anymore, turn it off, plug the charger back in and wait until 100% charge is reached.
  7. Unplug the charger the turn the phone on again.
  8. Use the phone until you drain the battery down to 0.
  9. Repeat the cycle once.

Do more research. We can only discuss so much about this topic in this post so we recommend that you invest more time in looking for other tips and tricks in minimizing battery drain issue. Unless there’s an unknown hardware or software issue behind the problem, battery drain is mostly caused by poor usage habits so use your smarts in dealing with it.

Problem 3: Galaxy Note 4 fingerprint sensor not working

Have Note 4. When i go to unlock it the screen comes on but the finger print sensor doesn’t work and the screen doesn’t respond so i can’t enter password to unlock. i did a soft reset and a hard reset, still the same. If i turn it off then on i can enter the password and the phone works perfect until it goes to screen lock, then the screen won’t let me enter the password. (the keyboard doesn’t show or sometimes shows for a slit second and disappears. — Rdrussell

Solution: Hi Rdrussell. We don’t know what exactly you mean by hard reset but if you’ve already tried a factory reset via Recovery mode without any apparent positive result, you should consider a phone replacement.

Problem 4: Galaxy Note 4 wifi not working

I have Wifi set to always on, but it turns off when the phone is asleep. Further, when I try to turn it on, the switch turns grey before eventually settling back into the off position. When I am charging the phone, the Wifi will turn on with much coaxing, and even connect, but it will then immediately drop and reconnect, occasionally turning off then on. Sometimes, it will turn on and not find the network. I have tried hard and factory resets, even flashing the ROM and the problem persists. Do you think that this sounds like an antenna issue or a chipset issue, or something else? Is there anything that I would be able to do about this? — Michael

Solution: Hi Michael. If a factory reset did not fix the issue, there’s a chance that the problem is hardware-related. The networking chip may not be working properly for some reason so a phone replacement should be the best option for you.

Problem 5: Galaxy Note 4 suddenly dies and won’t power back on

Hi. I for soon 2 years ago bought a Samsung Galaxy Note 4. It has been working perfectly fine and dandy. But for a couple of days ago I traveled from Sweden to Beijing, China. To keep up with the rest of the world I used a VPN on it and changed the SIM card to a Chinese brand. Everything went smoothly until today when I travelled domestic for 3.3 hours. It was fine and I was listening to music the whole time, but when the plane landed I only had 15% left and it died. I tried starting it up but the text where it stands “Samsung Galaxy Note 4, powered by Android” only showed up for 1 second before it turned of again. This is not the first time this has happened so I thought nothing about it and just went on like normal to the hotel. Unfortunately when I arrived at the hotel and tried starting it again after putting it in the charger it still did the same thing. Except when the charger is in the screen also shows the “SAMSUNG” text for 2 seconds now. The little lamp that usually shows red/green to indicate if it’s on full power or not is not working at all. I really need my phone so would appreciate if you know what the problem is and how it can be fixed. Cheers. — Jenny

Solution: Hi Jenny. There’s a number of things that you must check in this case but we recommend that you try getting a new battery first.

There’s no software troubleshooting that you can do in this case except to try and see if you can turn the phone to other modes. Here are the steps on how to do that:

Boot in Recovery mode:

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

Boot in Download Mode:

  1. Charge the phone for at least 30 minutes.
  2. Press and then hold the Home and Volume DOWN keys, then press and hold the Power key.
  3. When the Samsung Galaxy logo shows on the screen, release the Power key but continue holding the Home and Volume DOWN keys.
  4. Wait until the Download screen appears.
  5. 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.
  6. Use Google to look for a guide on how to do it.

Boot in safe mode:

  1. Charge the phone for at least 30 minutes.
  2. Press and hold the Power button.
  3. Once the Samsung Galaxy logo appears, release the Power key and immediately press and hold the Volume Down button.
  4. Continue holding the button until the phone finishes rebooting.
  5. Once you see the text “Safe mode” at the bottom left corner of the screen, release the Volume Down button.
  6. 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.

If your Note 4 won’t boot to any of the modes above to allow you do to follow up troubleshooting, it’s hardware must be dead. Get a new phone if possible.

Problem 6: Galaxy Note 4 update notifications won’t stop

Hello. I have a Samsung Galaxy Note 4. A few days ago my Fitbit app was not working. On the Fitbit help forum it recommended that I check to see if my phone needed a software update. I did check, and it did need an update. I installed the update and the phone was working fine. The Fitbit app was working again after the update as well. However that night I got the notification that my phone had a software update available. I tried the update again. It finished and my phone was working fine. However it tells me there is a software update available again. I checked out some of the articles on your website and I tried to clear the cache thing, but it didn’t work. The software update available came up again. I tried the update again. After it finished the icon for the software update came up again. So I tried a soft reset and took out the battery and when I turned the phone back on the software update icon is still in the drop down menu. Thank you in advance for your help. — Mary Cate

Solution: Hi Mary Cate. If the update notification keeps showing up, try to check if you can turn it off first by going under Settings>About device>Software update. Sometimes, carriers disable the option for a user to download updates manually so if you can’t turn the automatic notifications off, you must try to do a factory reset to fix it. Refer to the steps above on how to do it.

Problem 7: Galaxy Note 4 won’t charge and drains battery fast

I noticed my Note 4 would charge in a strange way. It would say “connect to dock” when I was using a charge cable (not a docking station), it would charge very fast and die very quickly. Sometime it would not charge at all and the battery would drain while using it plugged in. I tried different cables and it did not change. I purchased a new battery and it charged fine after I replaced the battery but it would not hold the charge. It would go down 20 percent in an deters little as 8 mins using the Facebook app. I purchased a new USB charge port and installed it. Battery lasted a little longer but then my soft keys would not work. I messaged the guy I bought the charge port from and he sent me and replacement. Put that one in and nout change in battery life and my soft keys still do not work. I thought I may have damaged the port when replacing it so I put the original port back in and my soft keys worked fine but the phone would not charge properly and would die rather quickly. Any ideas? — Shawn

Solution: Hi Shawn. Just get a new phone. The issue is apparently not battery- or charging port-related so identifying which component in the motherboard is causing the problem is simply too impractical. Some users were successful in fixing this kind of problem by replacing the power IC but some are not so lucky. If you think you can manage to get hold of a new power management IC for this device and replace it yourself, you should try that first. Otherwise, just keep your money so you can buy a new phone.

Problem 8: Galaxy Note 4 cannot make or receive calls randomly

For the past two days, my Note 4 cannot make or receive calls randomly. Calls get disconnected as soon as they are placed. I cannot receive calls or text messages. This happens randomly., because sometimes it works fine. I checked to see if I have the do not disturb on and I don’t. I have gone through every setting heading to see if there is an error. I couldn’t find any. I have restarted and rebooted too. I am worried that I will loose data if I do a factory reset. If it comes to that, how do I backup all my data. I do not know the Android version and have guessed it. — Rajashree

Solution: Hi Rajashree. Did you do anything different before this problem started? Was there any app or system update? Did you install any new app? Any of these things may cause the problem so try your best to remember everything.

If there’s nothing different that happen at all, contact your carrier and let them know of the problem. The issue is probably caused by service interruption or outages in your area. If device troubleshooting is needed, they can also walk you through it.

Problem 9: Galaxy Note 4 keeps saying lock screen is needed, messaging app keeps crashing

I have a Galaxy Note 4 with AT&T. My phone all of a sudden is requiring me to have a lock on my home screen. I want it to go back to just swipe but swipe is disabled “due to administrator, credentials or security update.”

My second problem is my standard messaging app is having issues. I can open the app and all of a sudden there’s no messages. When I try to send messages, they do not go through, and it randomly crashes even when I’m not using it. I still get notices from it not working. I have no idea what’s going on… Any advice? — Victoria F.

Solution: Hi Victoria F. If your phone is provided by your work company, of if you purchased a pre-owned one in this setup, there’s no way around it but to simply use a lock.

However, if the issue appeared out of a sudden and you were able to use it before without any screen lock, try to wipe the cache partition to see if that will fix it. Here’s how:

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

If clearing the cache partition won’t fix the problem, do a factory reset. Refer to the steps above.

For your second issue, you should try to delete the messaging app’s cache and data before attempting a factory reset. To wipe an app’s cache and data, follow these steps:

  1. Open the Settings menu either through your notification shade (drop-down) or through the Settings app in your app drawer.
  2. Navigate down to “Apps”. This may be renamed to something like Applications or Application Manager in OEM skinned versions of Android 6 or 7.
  3. Once in there, click on an application.
  4. You’ll now see a list of stuff that gives you information about the app, including Storage, Permissions, Memory Use, and more. These are all clickable items. You’ll want to click on Storage.
  5. You should now clearly see the Clear Cache and Clear Data buttons for the application.


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