After installing the latest May 2023 update, the Galaxy S21 randomly reboots. This guide will show you how to fix the problem. One of the few companies in the market that offers up to 5 years of updates [4 years of OS plus one more year of security patches] is the South Korean giant. These patches are typically rolled out to enhance security, improve performance, and fix underlying problems. Unfortunately, that doesn’t always happen.

There have been numerous complaints about the Galaxy S21 randomly rebooting after installing the latest May 2023 update. The phone freezes before powering off and then restarts a few seconds later. Moreover,  this tends to happen multiple times throughout the day. As a result, there is a nifty workaround that should help you resolve this issue. Let’s take a look at it without further ado.


Understanding the Random Reboot Issue

After the May 2023 update, Samsung Galaxy S21 users may experience random reboots. Unexpected restarts disrupt your workflow, interfere with important tasks, and may result in data loss. For the issue to be addressed and resolved effectively, the underlying causes must be identified.

Possible Causes of Random Reboots

There are several possible causes of random reboots on the Galaxy S21 after the May 2023 update. Some of them are:

  • Cache corruption: Accumulated system cache can lead to software conflicts, resulting in random reboots.

  • Third-Party Apps: Some third-party apps may not be optimized for the latest update, causing random reboots.

  • Software Glitches: Sometimes software glitches happen during update processes, causing instability and random reboots.

  • Operating System Bugs: Random reboots can be caused by bugs in the operating system.

You’ll be able to implement the appropriate troubleshooting steps once you know what’s causing your device to reboot randomly.

Fix Galaxy S21 random reboot after May 2023 update

Currently, the only workaround that is working for users is deleting their data from their devices. In that case, please take a backup of all the data on your device and then follow one of the following two methods:

From Settings Menu

  • Reset your settings by going to Settings > General Management

  • Next, select Factory Data Reset > Reset > Delete All.

  • Make sure your device is set up correctly and check out the result afterwards.

From Settings Menu

From Recovery Mode

  • Connect your device via a USB cable to your PC and turn it off.

  • Hold down the volume up key and the side keys at the same time.

Samsung Galaxy A21s logo appears,

  • When the Samsung Galaxy logo appears, release them.

  • The Volume key should be used to highlight “Wipe Data/Factory Reset partition”.

Wipe data

  • Press the power key to confirm. Now the reset will begin.

  • Check out the results once you’ve set up your device.

More Troubleshooting Steps:

Step 1: Clear Cache Partition

Cleaning the cache partition often fixes software conflicts and eliminates random reboots. Here’s how to do it:

  1. Shut down your Galaxy S21.

  2. Hold down the Volume Up and Power buttons until the Samsung logo appears.

  3. Navigate to “Wipe cache partition” and select it with the volume keys.

  4. Select “Reboot system now” once the process is done.

2: Boot in Safe Mode

In Safe Mode, you can see if a third-party app is causing the reboots. Follow these steps to boot in Safe Mode:

  1. Turn off your Galaxy S21.

  2. Hold the Power button until you see the Samsung logo.

  3. Press and hold the Volume Down button after releasing the Power button.

  4. Hold the Volume Down button until the device restarts.

  5. Observe if the random reboots persist in Safe Mode. In that case, it’s probably a third-party app.

3: Update Apps and Software

Compatibility issues and random reboots can happen when apps and software are outdated. Follow these steps to make sure your apps and operating system are up to date:

  1. Go to the Google Play Store app on your Galaxy S21.

  2. Open the menu by tapping the three horizontal lines in the upper-left corner.

  3. Click “My apps & games” to see what’s installed.

  4. To update all apps, tap “Update all”.

  5. Download and install the operating system from Settings > Software update.

Check if the random reboots still happen after updating.

4: Reset App Preferences

It’s easy to fix conflicts caused by app settings by resetting their preferences. Make sure you follow these steps:

  1. On your Galaxy S21, go to Settings.

  2. Choose Apps or Applications.

  3. Choose “Reset app preferences” from the three vertical dots in the upper-right corner.

  4. When prompted, confirm the action.

It’ll reset all your app preferences to their defaults while preserving your data. Make sure the random reboots don’t stop.

Additional Tips to Prevent Random Reboots

Consider these tips to minimize the chances of your Galaxy S21 rebooting randomly:

  • Install the latest software and security patches on your device and apps.

  • Ensure compatibility by installing apps from trusted sources, like Google Play Store.

  • It’s best not to install multiple apps that do the same thing, since they might conflict.

  • To avoid any potential software conflicts, clear your cache and data regularly.

  • Make sure your internet connection is stable when installing software updates.

  • Keep an eye on battery life and make sure your device is charged enough so it doesn’t shut down unexpectedly.

Following the troubleshooting steps outlined in this guide will fix random reboots on the Galaxy S21 after the May 2023 update. Your Galaxy S21 can be stable and reliable by identifying the underlying cause and implementing the appropriate solutions.

Don’t hesitate to contact our support team if the issue persists. Let us help you with any technical difficulties and make sure you get the most out of your device.


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