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Samsung Galaxy S21/S22 Randomly Shuts Off – How to Fix

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Does your Samsung Galaxy S22/S21 keep restarting randomly without any reason? If your answer is yes this article will help you to find out the reasons and how to fix the Samsung Galaxy S21 and S22 randomly shut-off issue. 

 You might be in the middle of work with your phone, or not doing anything at all. It randomly shuts off as an unwelcome surprise. Now you have to do something about it before start using your phone.

We know how frustrating it can be when you want to use your phone but cannot due to the random restarts. Also, it can affect the lifespan of your smartphone. 

Fortunately, you are not the only person experiencing this issue. You can find many S22/S21 smartphone users have reported the same problem on communities like Samsung’s official forum/Reddit, etc. Don’t worry about that.

To make your life easier, this guide will reveal to you how to get rid of unexpected shutdowns on your Samsung Galaxy S21/S22.

Even if you’re using other variants of these 2 devices (such as Plus models and Ultra models), everything explained in this article is also suitable for them as well.

Let’s get started!                                                                                

Why Does Samsung Galaxy S21/S22 turn off randomly?

Why your Smartphone keeps restarting

Most of the time, this problem occurs because of battery-related issues. Therefore, if your Galaxy smartphone usually shuts down without giving you a warning, that means there is something wrong with your smartphone’s battery.

Apart from that, there are some other reasons that can cause unexpected restarts.

  • Your Galaxy S21/S22 has a firmware-related issue and it could probably be corrupted cache files, software update bugs, or malware.
  • A third-party app may be consuming a lot of battery power.
  • Misconfiguration in Settings.
  • Some back covers can’t perfectly fit and can jam the power button.
  • Due to safety reasons, overheating may cause the phone to crash.
  • If your phone fell on a hardened surface or in water and is physically damaged.

How to fix Random shuts down/Restarts on Samsung Galaxy S21/S22

how to fix samsung galaxy s21-s22 keeps restarting

Here are easy  9 solutions to fix your Galaxy smartphone from unexpected crashes. These fixes are listed as the easiest to do so it won’t take a lot of time for you to solve the problem.

01 – Check the power key and volume keys

Check Power button/Volume buttons on your galaxy S21/S22

It is obvious if the power button is jammed, it can continuously restart your smartphone. Although, you need to tap the shut down button manually when you put your smartphone in a pocket or a bag.  Even any other accidental touches can make your phone switch off without you even knowing it.

  • Remove if you use any back cover on your Galaxy S21/S22
  • Then press the power button and make sure you can feel its pressing sound

(but if the key is jammed you will not feel any feedback and then you have to take your phone to the nearest Samsung repair center.)

If you can see any dust or other particles stuck between the key and the body, that may be the reason jammed the key.

Also, check the volume keys as well since the combination of volume + power button can put your device into safe mode/recovery mode, etc.

02 – Terminate high-power consumption apps

High power-consuming apps are another nightmare for your battery. Therefore, terminating or forcefully closing those apps is the best option if you want to keep such apps on your smartphone.

Here is how you can close apps that use high battery power on your device.

  1. Go to “Settings” on your Galaxy S22/S21.
  2. Find and tap on “Device care”.
  3. Tap on “Battery”.
device care
  1. Tap on the battery usage graph.
Battery usage
  1. Then you can see a list of apps and the battery level they consume. Select the unnecessary apps and force stop them.
power consuming apps

03 – Disable Auto Restart

If you do not know, there is an option called “Auto restart” on your Galaxy smartphone’s settings and if this feature is enabled, your device will restart at a scheduled plan. 

So if you want to keep your smartphone always on, you better disable the auto restart feature on your Galaxy S21/S22.

  1. Open Settings > Device care
  2. Tap on the three dots at the top right corner
Device care - 2
  1. Turn off the “Auto restart” option.
Turn off Auto restart

05 – Calibrate the battery

Samsung Galaxy S21 comes with a 4000 mAh battery and the S22 comes with a 5000mAh battery. Overall the battery power is enough to use the device all day after a single full charge.

However, if the battery is not calibrated correctly, it will drain fast and you will face random shutdown on your smartphone. Usually, the battery of Samsung smartphones is pre-calibrated but as you use the battery. It may need a re-calibration to work properly.

To calibrate your Samsung galaxy S21/S22 battery, follow the steps below.

  1. Turn off the device.
  2. Discharge your phone completely.
  3. Insert the power cable and make it fully charged.
  4. Power up the device back.

06 – Boot into safe mode

Boot and safe mood are important for you to see the last installed applications and uninstall unnecessary apps. When you turn on a safe mood in the S22 phone it gives you better results.

The first power of the phone. Then power it back on. When you see the Samsung logo appear, press and hold the volume down key.

07 – Perform a network reset

If you want to work your network properly, follow the below process 

  1. Open the “Settings” app.
  2. Scroll down to, and select, General Management.
Samsung General Management
  1. Scroll down and tap Reset.
  1. Tap “Reset network settings”.
Reset Network Settings
  1. If prompted, enter your PIN or passcode.
  2. Tap “Reset” again to confirm.

08- Wipe cache partition

Wiping the cache partition removes the unnecessary cache and fixes some bugs in your phone. This way does not affect saved items on your phone. So you don’t need to back up your phone. Errant systems and wrong residual data can be the problem for this. Now you can see below how to wipe the cache partition in Samsung Galaxy S22.

Read: Recovery Mode on Samsung Galaxy Smartphones – Complete Guide (2022)

  1. Turn off the device.
  2. Press and hold the power button + volume down button.
  3. Once the phone boot into recovery mode select “wipe cache partition”.
wipe cache partition
  1. Select confirm.
  2. After the wipe cache completes, restart the device.

09 – Factory reset your S21/S22

By factory resetting your Galaxy S22, its settings, cached data, and every other data will be erased. Therefore, remember to take a backup before resetting your smartphone.

  1. Go to settings > General Management > Reset
  2. Tap on the “Factory data reset” button.
Factory data reset - Galaxy S20
  1. Confirm to proceed with factory data reset.

10 – Contact Samsung Customer support

If none of the above solutions worked, you can contact Samsung customer support online and get support from an expert on your phone.

  1. Visit Samsung’s online customer support
  2. Select the device and model.
  3. Proceed to the customer support portal for your Galaxy S21/S22.


That is all about the solutions to fix the random power-off problem on your Samsung Galaxy  S22.

If you have any questions regarding this guide, feel free to leave a comment below.

Thanks for reading, have a nice day!


The founder of and the tech nerd of the team. He is specialized in Android/iOS development and web development.

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