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

Some of our readers who own the Samsung Galaxy S8+ have been complaining about the error message “Unfortunately, Phone has stopped,” which according to some, started without apparent reason or cause. But basically, the error actually just notifies you about the built-in phone app that crashed for some reason. It might be just a simple problem with the app itself or a problem with the firmware. Rest assured though that this kind of problem is not really that complex and can be fixed by basic troubleshooting procedures.

In this post, I will walk you through in troubleshooting your Galaxy S8+ that’s showing this error message. We’ll try to take into consideration every possibility and rule out each of them until we can arrive at the point where we can easily pinpoint what the problem really is and what needs to be done to fix it. So, if you own this phone and are currently bugged by a similar problem, then continue reading below as this post may be able to help you.

Now, 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.

Step-by-step guide to troubleshooting Galaxy S8+ with “Phone has stopped” error

This error message might be a really annoying problem since one of the basic functions of your phone won’t work when you want to use it but you may be able to fix it on your own. Now, before we proceed with our troubleshooting, read the problem below…

Problem: Hello guys. I am hoping you could tell me what to do. I own the new Galaxy S8+ and for some reason, it started showing the error “Unfortunately, Phone has stopped.” It’s a brand new phone and it’s really bugging me off since I can no longer make phone calls or receive one. Can you please help me?

Troubleshooting: The course of our troubleshooting would be to rule out each possibility and we will begin with the app that’s crashing. That said, here’s what you should do:

Step 1: Clear the cache and data of the Phone app

This should be the first thing you should do since the error specifically mentions the name of the app that’s crashing. We have to assume first that this problem is caused by an app and with that being said, make sure you backup your contacts and then follow these steps to reset the phone app.

  1. From the Home screen, swipe up on an empty spot to open the Apps tray.
  2. Tap Settings > Apps.
  3. Tap Phone 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.

Step 2: Clear the cache and data of Contacts app

This is not the first time we encountered this problem and based on our experience, this error may also be caused by the Contacts app, which works well with the Phone app. It’s always possible the error is also triggered by it so you should reset it, too. But I’m assuming now that you’ve already backed up your contacts.

  1. From the Home screen, swipe up on an empty spot to open the Apps tray.
  2. Tap Settings > Apps.
  3. Tap Contacts 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.

Step 3: Uninstall any third-party phone app you installed

This is optional and applicable only if you’ve installed a third-party phone app prior to the problem. We just have to rule this possibility out before we actually proceed to much complex troubleshooting procedures. Follow these steps to uninstall the app from your phone:

  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.

If this problem persists, then move on to the next step.

Step 4: Reboot your phone in safe mode

In this step, I want you to start  your phone up in Safe mode wherein all third-party apps are temporarily disabled so that we can isolate the problem if it’s caused by other third-party apps. This is how you start your Galaxy S8+ in safe 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.
  8. Uninstall apps that are causing a problem.

Assuming the error message doesn’t show up in this mode, then it’s obvious the problem is caused by a third-party app. You have to find that app and if you already have a suspect, try to see if it needs to be updated, then try to reset it and if that won’t work, you have to uninstall it.

How to update apps in your Galaxy S8+

  1. From the Home screen, swipe up on an empty spot to open the Apps tray.
  2. Tap Play Store.
  3. Tap the Menu key and then tap My Apps. To keep your apps automatically updated, tap the Menu > Settings then tap Auto-update apps to select the check box.
  4. Choose one of the following options:
    • Tap Update [xx] to update all applications with updates available.
    • Tap an individual application and then tap Update to update a single application.

How to reset apps on your Galaxy S8+

  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 your Galaxy S8+

  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.

Step 5: Try deleting the system caches as some may have been corrupted

Corrupt system caches may also cause some apps to crash. That’s why if the error still shows up even in safe mode, then you’ll have to do this step to rule out the possibility that the error is triggered by some corrupt system caches.

To delete all system caches, you have to boot your phone up in recovery mode and then wipe 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.

The phone will take a little more time to boot up after this procedure as it rebuilds the caches but if the error still shows up after this, then you have to do the next step.

Step 6: It’s time to reset your phone

After doing all the steps above and the problem still occurs, then you have no other choice but to reset your phone. But before you do that, make sure you make a backup of your important files and data as they will be deleted. Then disable the Factory Reset Protection so that you won’t be locked out of your phone after the reset.

How to disable Factory Reset Protection on Galaxy S8+

  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.

How to reset your Galaxy S8+

  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.

You may also reset your phone from the Settings menu…

  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. From the Home screen, swipe up on an empty spot to open the Apps tray.
  3. Tap Settings > Cloud and accounts.
  4. Tap Backup and restore.
  5. If desired, tap Back up my data to move the slider to ON or OFF.
  6. If desired, tap Restore to move the slider to ON or OFF.
  7. Tap the back button to the Settings menu and tap General Management > Reset > Factory data reset.
  8. Tap Reset device.
  9. If you have screen lock turned on, enter your credentials.
  10. Tap Continue.
  11. Tap Delete all.

I hope this troubleshooting guide can help you.

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