Samsung Galaxy S21

Samsung S21 Whatsapp is Not Working (Crashing) – How to Fix

Complete guide to fix if WhatsApp is not working on your Samsung Galaxy S21.
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WhatsApp, like any other social media app, has become an integral part of our daily life, serving to send messages, make voice and video calls, and share multimedia content. However, when WhatsApp stops working or crashes on your Samsung Galaxy S21, it can be a frustrating experience.

This issue can occur due to a couple of reasons such as a bad internet connection, outdated WhatsApp version, software glitches, and corrupted app cache. But don’t worry, in this guide, we will walk you through proven solutions to make WhatsApp run smoothly again.

Note: Solutions in this guide will work on any Samsung Galaxy S21 model (S21, S21 Plus, S21 Fe, and S21 Ultra models.) 

Editor’s note: We created these instructions using a Samsung Galaxy S21 running Android 13. Depending on your device’s software version, some steps and menu positions may look slightly different.

Check this video we have created for this specific problem

Fix 01: Force Stop Whatsapp

When you use an app like Whatsapp, it continues to run in the background even after you’ve closed it. This is to ensure that you can quickly access the app again without any delay.

However, sometimes, this background operation causes the app to malfunction or crash due to various reasons such as software glitches, overuse of system resources, or conflicts with other apps.

Force-stopping Whatsapp means you’re telling your device to completely shut down the app and stop it from running in the background. This helps in resolving issues like app crashes as it gives the app a fresh start when you open it again.

Here’s how you can force-stop Whatsapp on your Samsung Galaxy S21:

  1. Go to Settings.
  2. Tap on Apps.
  3. Tap on Whatsapp.
Whatsaapp in apps list
  1. Then, tap on Force stop.
Force stop whatsapp

Fix 02: Check the Internet Connection

One of the reasons for Whatsapp not working or crashing is a poor or unstable internet connection. Whatsapp relies heavily on a stable internet connection to send and receive messages, make calls, and other functionalities. If your internet connection is weak, slow, or unstable, Whatsapp will not work properly or crash unexpectedly.

To check the internet connection, try using other apps on your Galaxy S21 that require internet, such as browsing the web or using other social media platforms. If these apps work without any issues, then your internet connection is not the problem.

However, if only Whatsapp is experiencing issues, it’s possible that the Whatsapp service itself is down. You can check the status of Whatsapp service on websites like DownDetector. If there’s a widespread issue, you may need to wait until Whatsapp resolves the problem.

If your internet connection is the issue, need to move closer to your Wi-Fi router, switch to a stronger network, or contact your internet service provider for further assistance.

Fix 03: Restart the Device

Like restarting the app, this will reset your system by closing all open applications and clearing any temporary data that causing the problem.

To restart your Samsung Galaxy S21:

  1. Press and hold the power key and volume down key together until you get the power menu.
Force restart samsung
  1. Tap on the restart button.
Restart phone
  1. Confirm by tapping on the restarting button again.

Once your device has restarted, open WhatsApp and check if the problem has been resolved.

Fix 04: Clear Whatsapp App Cache

The cache is a type of temporary data storage that helps apps run more smoothly. However, over time, these files can become corrupt or bloated with outdated data and cause apps like Whatsapp to crash.

In such cases, clearing the Whatsapp cache is the effective way to resolve this issue. 

Don’t worry, clearing the cache won’t delete any of your personal data or messages stored in Whatsapp. It also won’t affect any photos or videos saved in your device’s gallery from Whatsapp.

Here’s how you can clear the Whatsapp cache on your Samsung Galaxy S21:

  1. Go to Settings.
  2. Tap on Apps.
  3. Tap on Whatsapp.
  4. Go to Storage.
Whatsapp app storage
  1. Tap on Clear cache.
Clear whatsapp cache

Fix 05: Update Whatsapp

Whatsapp usually notifies users when an app update is available. It also has a way to force users to update the app if the update is urgent to install. However, even if a minor update can fix app bugs that can cause it to crash.

This is why we always recommend updating the app if it doesn’t work or crashes. In this case, it is the WhatsApp app.

Here’s how you can update Whatsapp:

  1. Open Google Play Store.
  2. Tap on the search bar and type WhatsApp.
Whatsapp on playstore
  1. Tap on the app from the search result.
  2. Tap on Update.

Wrapping Up

We hope this guide has helped you to fix the WhatsApp not working issue on your Samsung Galaxy S21. If you have any further questions or need help, feel free to leave a comment below. We will be there to assist you.

Have a nice day!

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

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