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Samsung Galaxy S8 Plus keeps lagging and showing “Unfortunately, Settings has stopped” error [Troubleshooting Guide]

When an app crashes on a high-end phone like the Samsung Galaxy S8+, we can consider it as a minor problem and probably a glitch considering app crashes are often associated with low resources. A high-end device will not run out of resources to cater small apps and their services. However, if the app that’s crashing is the Settings, then it’s probably a serious firmware issue since the app is, first, a built-in one and second, it oversees all apps are running the way the owner wants them to run.

In this post, I will walk you through in troubleshooting your Galaxy S8+ that lags and shows the “Unfortunately, Settings has stopped” error. We have to look into some of the possibilities and rule out each of them to see if we can fix the problem easily. If after our troubleshooting the problem still occurs, then you have to bring your phone back to the store and ask for a replacement as it’s experiencing firmware issues rather than app problems.

Before we go to troubleshooting, if you are currently experiencing a different problem, try to visit our troubleshooting page for we have already addressed some of the most common issues owners encountered with their device. Find issues that are similar to yours and feel free to use our solutions or troubleshooting guides. If they don’t work, however, and if you need further assistance, contact us by completing our Android issues questionnaire. All we need is information so we can help you. Don’t worry, it’s free.

Galaxy S8+ started to lag and show “Settings has stopped” error

I understand your phone is still new and it should work perfectly without a hitch but sadly it isn’t, so the best thing to do is troubleshoot it. We just have to do a few steps and if the problem still continues after that, then have the phone replaced. Now, here’s one of the messages from our readers that best describes how this problem occurs…

Problem: Hi droid guy. I need your help. My phone is a Galaxy S8 Plus I bought a week or so ago. I don’t know what I’ve installed on it that it started to lag one day and then yesterday another problem occurred. An error that says “Unfortunately, Settings has stopped” started to show up every time the phone lags. Now, the phone is very slow that I cannot use it anymore. I badly need your help guys because I just don’t know what I have to do about it. I’m so worried and didn’t have time to go back to the store because of my job. Any help would be appreciated. Thanks.

Troubleshooting: Now that you know how this issue came to be, here’s what you need to do…

Step 1: Boot your phone up in safe mode

Booting in safe mode alone without doing anything won’t fix the problem but this step is very important as it gives you an idea why the phone is lagging in the first place. Doing so will temporarily disable all third-party apps and if one of them is causing the lag and triggering the error, then the problem shouldn’t occur in this mode.

  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.

Assuming the problem is fixed in this mode, you have to find the apps that are causing the problem and first, clear their caches and data and then uninstall them if the problem remains.

How to clear app cache on Galaxy S8 Plus

  1. From the Home screen, swipe up on an empty spot to open the Apps tray.
  2. Tap Settings > Apps.
  3. Tap the desired application in the default list or tap 3 dots icon > Show system apps to display pre-installed apps.
  4. Tap Storage.
  5. Tap Clear cache.
  6. Tap Clear data and then tap OK.

How to uninstall apps from Galaxy S8 Plus

  1. From the Home screen, swipe up on an empty spot to open the Apps tray.
  2. Tap Settings > Apps.
  3. Tap the desired application in the default list or tap 3 dots icon > Show system apps to display pre-installed apps.
  4. Tap the desired application.
  5. Tap Uninstall.
  6. Tap Uninstall again to confirm.

However, if the phone is still lagging and showing the error in safe mode, then move on to the next step.

Step 2: Wipe the cache partition

This method is effective and safe for your data and phone that’s why if the problem occurs even in safe mode, you will have to delete the system caches so they’ll be replaced. You can do so by booting your phone up in recovery mode and wiping the cache partition:

  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 to highlight “yes” and 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.

If, however, the problem still happens after this, then you have to reset your phone before bringing it back to the store.

Step 3: Perform the Master reset

Boot your phone back in safe mode and try to backup your files and data and then disable the Factory Reset Protection, this way you won’t be locked out of your phone after the reset. Here’s how you do it:

  1. From the Home screen, swipe up on an empty spot to open the Apps tray.
  2. Tap Settings.
  3. Tap Cloud and accounts.
  4. Tap Accounts.
  5. Tap Google.
  6. Tap on your Google ID email address if multiple accounts are setup. If you have multiple accounts setup, you will need to repeat these steps for each account.
  7. Tap 3 dot icon.
  8. Tap Remove account.
  9. Tap REMOVE ACCOUNT.

Now, it’s time to reset your phone…

  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 data / factory reset.
  5. Press Power button to select.
  6. Press the Volume down key until ‘Yes — delete all user data’ is highlighted.
  7. Press Power button to select and start the master reset.
  8. When the master reset is complete, “Reboot system now” is highlighted.
  9. Press the Power key to restart the device.

If all else fails, bring the phone back to the store and have it replaced.

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