Fix Samsung Galaxy Note 5 that slowed down after the Marshmallow update [Troubleshooting Guide]

While Android 6.0 #Marshmallow (also known as Android M) for the Samsung #Galaxy Note 5 (#Note5) has been rolled out a few months ago, some users are just getting notifications about. It’s because the roll out of a firmware update depends on the carrier and more often it’s made available for users by region.


Since it’s a major update, many have been anticipating it especially that it will bring some performance-related improvements, fixes to common problems and new features. But anticipation turned into frustration as some users reported some serious problems with their phones shortly after they installed the update.

In this post, I will tackle one of the most common issues reported by users–Note 5 noticeably slowed down after Marshmallow was installed.

Before we go to our troubleshooting, for our readers who may have other concerns, make sure you visit our troubleshooting page as we’ve already addressed hundreds of problems with this phone since it was released. Find issues that are similar or related to yours and use the solutions we suggested.

If you need further assistance, we offer free Android support. All you gotta do is fill up our Android issues questionnaire and make sure you provide us with as much information as possible. Remember that the more information you provide, the more accurate our solutions will be.

Galaxy Note 5 became so slow after the Marshmallow update

More often, when it comes to the general performance of the phone, it’s always the firmware that’s responsible, although there were reports that hardware issues also caused the Note 5 to slow down. But the thing is, in this case, we’re talking about a unit that noticeably slowed down after the Marshmallow update. So, it is crystal clear that the firmware is the issue. That being said, here are the things you need to do…

Step 1: Reboot your Note 5 in safe mode

This step is necessary to isolate the problem as there are times when third-party apps cause the phone to slow down or even crash. Considering the Marshmallow update is a big one, some of your downloaded apps may be incompatible with the new OS and if there’s no available update for them, it’s best you uninstall them so they won’t cause any more troubles.

  1. Turn off your Galaxy S6.
  2. Press and hold the Power key.
  3. When ‘Samsung Galaxy S6 Edge’ appears, immediately release the Power key and then press and hold the Volume Down button.
  4. Continue holding the Volume Down button until the phone finishes the restart.
  5. When you see Safe Mode on the lower left corner of the screen, release the button.

Once in safe mode, observe your device closely to find out if it’s still slow or sluggish. If so, then it really is the firmware that we have to go after. However, if the phone becomes faster, then there are apps that may have contributed to the problem. Find that app and update or uninstall it, although I’m not saying you should stop there. For all we know, it might be some of the apps and the firmware that have problems.

After you updated or uninstalled suspected apps, boot your device in normal mode and observe to find out if there’s a noticeable improvement to its performance. If not, then the next step will be useful.

Step 2: Delete the system caches

Caches are files created by the firmware so that apps and services run smoothly. More often than not, these files get corrupted during major updates. You need to clear or delete these files so that the new firmware will create caches that are compatible with it and get rid of corrupt ones.

Based on testimonies from users who encountered similar issues with their phones and were able to fix them, wiping the cache partition should be among the steps you need to take and we concur to that. So, here’s how you do it:

  1. Turn off your Galaxy Note 5.
  2. Press and hold the following three buttons at the same time: Volume Up key, Home key, and Power key.
  3. When the phone vibrates, release the Power key but continue to press and hold the Volume Up key and the Home key.
  4. When the Android System Recovery screen appears, release the Volume Up and Home keys.
  5. Press the Volume Down key to highlight ‘wipe cache partition.’
  6. Press the Power key to select.
  7. When the wipe cache partition is complete, ‘Reboot system now’ is highlighted.
  8. Press the Power key to restart the device.

This procedure has already been proven effective in fixing problems like this, however, there’s no guarantee that your issue will be fixed. So, if it failed, then you really have to reset your device.

Step 3: Do the master reset on your Note 5

This must come as the last resort due to the fact that your important files, data, pictures, etc. will be deleted when you do this and depending on how much data you need to backup, it may take several minutes to an hour before you can make a backup.

For firmware issues including those that occur after an update, a reset is very effective. So, after you booting your device in safe mode and wiping the cache partition and the problem remained, do the following steps to rule out the possibility that the phone has some issues with the new firmware.

  1. Remove your Google account and disengage the screen locks to make sure you won’t trip the Factory Reset Protection (FRP).
  2. Turn off your Samsung Galaxy Note 5.
  3. Press and hold the Volume Up, Home and Power keys together.
  4. When the device powers on and displays ‘Power on logo’, release all keys and the Android icon will appear on the screen.
  5. Wait until the Android Recovery Screen appears after about 30 seconds.
  6. Using the Volume Down key, highlight the option, ‘wipe data/factory reset’ and press the Power key to select it.
  7. Press the Vol Down button again until the option ‘Yes — delete all user data’ is highlighted and then press the Power key to select it.
  8. After the reset is complete, highlight ‘Reboot system now’ and hit the Power key to restart the phone.

If the reset failed as well, then it’s time you sent the phone in for repair.


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