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How to fix Samsung Galaxy Note 8 that keeps restarting by itself (easy steps)

A high-end smartphone like the Samsung Galaxy Note 8 may encounter a few hiccups here and there but not as often and as serious as the ones encountered by entry-level devices. However, we have readers who contacted us about a random reboot issue with their phone. Some said that it started after an updated while others reported that the problem occurred without apparent cause.

Clearly though, this problem is with the firmware but there’s also a chance that it’s due to a hardware issue that specifically concerns the battery. We will tackle this issue once again in this post for the benefit of our readers who reached out to us seeking assistance. Let’s try to look into each possibility and rule them out one by one until we can determine what the real problem is and why it’s happening.

Before we move on to our troubleshooting, if you are looking for a solution to a different problem in your Note 8, visit our troubleshooting page as we have already addressed some of the most common issues reported by our readers. Find problems that are similar with yours and use the solutions we suggested. If they don’t work for you or if you need further assistance, then fill up our Android issues questionnaire and hit submit to contact us.

Quick fix for Galaxy Note 8 that keeps restarting on its own

I want to share with you the effective way to deal with random reboot problems like this. This methods works perfectly for issues that occur after a firmware update. I will tell you why later. Now, to fix this problem, follow these steps. Don’t worry, none of your files and data will be deleted so it’s safe for both your phone and personal files…

  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 green Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  4. Press the Volume down key several times to highlight ‘wipe cache partition’.
  5. Press Power button to select.
  6. Press the Volume down key until ‘yes’ is highlighted and press the Power button.
  7. When the wipe cache partition is complete, “Reboot system now” is highlighted.
  8. Press the Power key to restart the device.

After doing this, continue using your phone to know if the problem still occurs or not. What makes this method effective is the fact that it deletes all system caches which may include ones that have been corrupted or became obsolete after an update. Once deleted, the firmware will create new ones and this time they should work perfectly with the new system.

However, if the problem continues after this, then we need to troubleshoot further to have a shot at fixing this issue.

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Troubleshooting Galaxy Note 8 that keeps restarting

I understand that some may be hesitant to follow the procedures in this guide so if you’re one of those, I suggest you take your to a service center to have it checked by the tech. However, for those who want to try fixing this problem, then continue reading as one of the procedures may work for you.

Make sure there’s no sign of liquid damage

Before we move on, it’s imperative that you physically inspect your phone for any signs of liquid damage because if this problem occurred due to water, then there’s no point in doing all the troubleshooting procedures below. I understand that the Note 8 is water-resistant but that’s all there is to it. Water resistance is never waterproofing so there’s still a chance that your phone is suffering from liquid damage. Here’s how you check the device…

  1. Look into the USB port to find any traces of moisture.
  2. Regardless whether there’s moisture in there or not, it’s better that you clean it up to get rid of any foreign materials that may cause more complications.
  3. Use a cotton swab to clean around the area or insert a piece of tissue paper to absorb the moist.
  4. Now check the Liquid Damage Indicator (LDI) to know if it’s tripped or not.
  5. Remove the SIM card tray and look into the SIM slot.
  6. If the LDI is still white, your phone is free of liquid damage but if it turned red or purple, it’s positive that water or any sort of liquid found its way into your device.

Again, if there’s a sign of liquid damage, bring the phone to the service center.

Try charging your phone

After making sure there’s no sign of liquid damage, it’s time to troubleshoot the device. The first thing you should do is connect it to its charger so that it would have a stable power source. Continue using it to know if it would still restart by itself.

The purpose of this step is to determine if the random reboots are caused by a failing battery. So, if the phone continues to work perfectly if it’s plugged in, it means that the battery may be faulty. However, if the reboots still occur even if the phone is charging, then continue troubleshooting it.

Observe your phone while in Safe mode

We’ve encountered cases wherein apps caused a phone to reboot randomly or when they’re used. This is another possibility we need to rule out before we move on to our last resort. Run your phone in Safe mode temporarily disable all third-party apps and continue observing it to know if it still reboots while it’s in that environment.

  1. Turn the device off.
  2. Press and hold the Power key past the model name screen.
  3. When “SAMSUNG” appears on the screen, release the Power key.
  4. Immediately after releasing the Power key, press and hold the Volume down key.
  5. Continue to hold the Volume down key until the device finishes restarting.
  6. Safe mode will display in the bottom left corner of the screen.
  7. Release the Volume down key when you see Safe Mode.

If the problem seems fixed while in this mode, the next thing you should do is find the app that’s causing the problem and uninstall it. However, if the problem still manifests while in this mode, then try doing the next step.

Perform the Master Reset

Again, this is your last resort but a problem like this can easily be fixed by this method. But the thing is, all your files and data will be deleted so make sure you create a backup of ones that are important to you. Then after the backup, disable the Factory Reset Protection so that you won’t be locked out of your device after the reset. Once everything is set and ready, follow these steps to reset your phone:

  1. Back up data on the internal memory. If you have signed into a Google account on the device, you have activated Anti-theft and will need your Google credentials to finish the Master reset.
  2. Turn off the device.
  3. Press and hold the Volume Up key and the Bixby key, then press and hold the Power key.
  4. When the green Android logo displays, release all keys (‘Installing system update’ will show for about 30 – 60 seconds before showing the Android system recovery menu options).
  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 this troubleshooting guide can help you fix similar issues with your phone. If you still need our help, feel free to contact us anytime.

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