Samsung Galaxy Note 9 constantly restarting after Android 9 Pie update

Some owners of the Samsung Galaxy Note 9 who recently updated their devices to Android 9 Pie complained because their phones are now constantly restarting. It is one of the many performance issues you may encounter if there are issues with the firmware. The thing is we don’t really know what the issue is all about without doing some troubleshooting procedures.

So, in this post, I will help you troubleshoot your Galaxy Note 9 that started to keep on rebooting after the Android Pie update. Let’s consider every possibility and rule them out one after another until we can figure out what the problem really is and fix it. If you’re one of the owners of this device and are currently being bugged down by the same issue after the Android Pie update, then continue reading as this post may be able to help you one way or another.

Before anything else, if you are looking for a solution to a different problem, then drop in on our Samsung Galaxy Note 9 Help Guides page for we have already solved some of the most common problems with this device. Try to find issues that are similar with yours and feel free to use our workarounds and solutions.

Fixing Note 9 that’s constantly restarting after Pie update

Performance issues are pretty annoying as it prevents you from doing things you often do but they’re not generally serious problems. Needless to say, you may be able to fix them on your own without having to ask a technician to do it for you. With that said, here’s what I suggest you do about this problem.

First solution: Observe your Note 9 in Safe Mode

We will try to isolate the problem immediately. I personally encountered this kind of issue in the past and I know that third-party applications can make your phone go crazy. One of them might be the reason why your device is constantly restarting or randomly reboots by itself. Therefore, you have to run your phone in safe mode to temporarily disable all third-party applications. Running your phone in safe mode won’t fix the problem but will tell you immediately if the cause of the problem is an app or not. Here’s how you restart your device in safe mode:

  1. Press and hold the Power key until power options show.
  2. Tap and hold the Power off option until Safe mode option appears.
  3. Touch Safe Mode to reboot your phone.
  4. Once the phone has successfully rebooted in safe mode, you will see the text on the lower-left corner of the screen.

Once the device is in this environment, continue using it to see if it’s still constantly restarting but assuming the problem is fixed, the next thing you should do is find out which of your apps is causing the problem and uninstall it. Begin with apps that you installed about the time you took notice of this problem. But if the phone continues to reboot by itself even in this mode, then move on to the next procedure.

ALSO READ: Samsung Galaxy Note 9 freezes and shuts down after Android 9 Pie update

Second solution: Delete the system cache so it will be replaced

Sometimes the system cache gets corrupted but after firmware updates, the old one will automatically become obsolete. Some of the files may still be useful to the system while others may not. In such case, performance issues may occur as the system continues to use the corrupt cache. The best way to rule this possibility out is to wipe the cache partition which doesn’t only delete the cache but replaces it with a new one.

  1. Turn off the device.
  2. Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  3. When the Android logo displays, release all three buttons.
  4. Once you see a black screen with blue and yellow texts, the phone is in recovery mode.
  5. Press the Volume down key several times to highlight wipe cache partition.
  6. Press Power key to select.
  7. Press the Volume down key to highlight yes, them and press the Power key to select.
  8. When the wipe cache partition is complete, Reboot system now is highlighted.
  9. Press the Power key to restart the device.

After this, continue your observation to know if your Note 9 is still constantly restarting because if it still does, the next thing you should do is make sure the settings aren’t messed up.

Third solution: Reset all settings in your phone

There are times when the phone acts up if some if its settings are messed up. Since we don’t know or can’t pinpoint which setting to be changed, it better to just change everything back to default. It may have a reset-like effects on your device but none of your files will be deleted. It is a very effective solution for many problems and it’s worth a try. Here’s how it’s done:

  1. Swipe down from the top of the screen to pull the notification panel down.
  2. Tap Settings and navigate: General Management > Reset > Reset settings.
  3. Tap RESET SETTINGS.
  4. If prompted, enter your PIN, Password or Pattern.
  5. Tap RESET SETTINGS.
  6. The device will restart to perform the reset of settings.

After this procedure and your phone is still constantly restarting, then move on to the last resort.

ALSO READ: Samsung Galaxy Note 9 slowed down after updating to Android 9.0 Pie

Fourth solution: Backup important files and reset your phone

When it comes to firmware issues and performance problems, a reset will always be the most effective provided that the firmware hasn’t been modified in any way. Before resetting your phone, make sure to create a backup of your important files and data as they will be deleted and you may no longer recover them. Once the backup process is complete, make sure to remove your google and Samsung accounts from your phone so that you won’t be locked out after the reset. Follow these steps to perform the master reset…

  1. Turn off the device.
  2. Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  3. When the Android logo displays, release all three buttons.
  4. Once you see a black screen with blue and yellow texts, the phone is in recovery mode.
  5. Press the Volume down key several times to highlight ‘wipe data / factory reset’.
  6. Press Power button to select.
  7. Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  8. Press Power button to select and start the master reset.
  9. When the master reset is complete, ‘Reboot system now’ is highlighted.
  10. Press the Power key to restart the device.

I hope that we’ve been able to help you fix your Galaxy Note 9 that’s constantly restarting. We would appreciate it if you helped us spread the word so please share this post if you found it helpful. Thank you so much for reading!

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