Samsung Galaxy S21

Samsung S21 Calls Cutting In and Out – How to Fix

Calls keep cutting automatically on your Galaxy S21? Let's fix it!
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Are you having trouble with your Samsung S20 or S21 calls cutting in and out? If so, you’re not alone. Many Samsung S20/S21 users have reported this issue, and it can be frustrating when you’re trying to have a clear conversation with someone. 

Fortunately, there are several solutions you can take to troubleshoot and fix this problem. Even though you are not a techie, fixing the issue is easier than you think.

This guide will give you possible causes for this issue and detailed yet straightforward instructions to help you get your Samsung S20’s calls working smoothly again. Whether you’re using the phone’s built-in dialer or a third-party app, we’ve got you covered. 

So if you’re ready to fix those cutting in and out calls, let’s get started!

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 12. Depending on your device’s software version, some steps and menu positions may look slightly different.

We have made a video on how to resolve this issue. Feel free to watch it!

Why Does Calls Keep Cutting Out During Calls On My Samsung S21?

Most of the time, poor signals are what cause the calls to cut out. If you are in a closed environment like a room and the signals are very poor in your area, this is probably why you are experiencing this problem.

But that is not the only possible reason. Another common cause is misconfigured or glitched network settings. There are plenty of options available on your Galaxy S20/S21 to configure under its network settings. Any misconfiguration can trigger these kinds of problems.

Also, bugs within the Android operating system, hardware issues, and sometimes even corrupted or outdated cache data can cause your Galaxy smartphone to calls dropping.

That being said, you don’t have to worry too much about this because in the next section, you are going to learn how to fix it by following our solutions. Keep reading…

Fix 01: Restart Your Phone

By restarting your Samsung S20/S21, we expect to fix the glitch or bug that occurred and caused the call cutting-out issue while you were using the device. 

When your smartphone restarts, the services, and functions will start working without any previous glitches. It is a common thing that occurring such glitches when we use our android devices for a long time. And this is the simplest solution you can do to overcome such problems. 

  1. Press and hold the power button + volume down button.
Button combination to restart samsung galaxy s21
  1. Release the keys once you get to the startup screen.

Fix 02: Check Signal Strength

Is this the first time you have used your Samsung S21? Did the calls drop start after you changed the connection? Or did you move into another area and suddenly calls started to cut out?

If one of the above situations relates to you, then you should probably check the signals in your current area.

If you are in a room, you can go outside to check the signals. You can check the SIM card on another phone. Or, you can change the sim card and try a different one on your Samsung smartphone. Then make a call to someone and see if the calls drop or cut out.

If the problem is poor signals, you have to change the network or contact your service provider to get a solution.

Fix 03: Reset Network Settings

Misconfigurations can happen accidentally or without knowing. But that doesn’t mean you have to go back and check and change every option under the network settings on your device. 

Since it is hard to identify which setting causes the issue, what if you can do a network reset to change the settings back to the default values?

Lucky for you, on your smartphone, there is an option called “Reset network settings” which you can use to revert the changes done to the network settings. Here is how you can do that.

  1. Go to Settings.
  2. Tap on General management.
  3. Then, tap on “Reset”.
Reset option samsung
  1. From the reset options, tap on “Reset network settings”.
Reset network settings
  1. Confirm.
  2. After the reset is done, restart your device.

Once your S20/S21 is restarted, you can try calling someone to make sure the problem is fixed.

Fix 04: Switch to 3G Network Mode

To overcome signal issues, you can try switching to the 3G network under device settings. Since the 3G network is widely available in any country, you should be fine with the 3G signals.

The reason why we suggesting to do this is that if you are on a 4G network and your device having problems receiving 4G signals, you will likely experience issues with calls and messages on your device.

  1. Go to Settings > Connections.
  2. Tap on “Mobile networks”.
  3. Select “3G/2G Auto” mode.
Network mode
  1. Restart the device.

Fix 05: Enable WiFi Calling

If your carrier supports WiFi calling and you have a WiFi connection, you can enable the WiFi calling feature on your Samsung S21. You can contact your carrier to check whether they support this feature.

WiFi calling can seriously improve the overall quality of calls you make. Therefore, enabling it can help to fix the calls cutting out.

Here is how to enable WiFi calling;

  1. Open the Dialer app.
  2. Go to Settings (tap on three dots at the top right corner).
  3. Tap on WiFi calling.
Wifi calling
  1. Enable WiFi calling by tapping on the toggle next to it.
Enable wifi calling

Fix 06: Change the SIM Slot

If your device model supports dual SIM, you can change the SIM card slot to make sure there is no hardware issue that is causing the calls to drop.

Use the SIM tool to take the SIM tray out and change the SIM 1 or SIM 2 slot. Then insert it back and turn on your device.

After, you can make a call and see if the calls cutting out even after changing the slots. If the problem seems fixed, take your device to the nearest Samsung service center to check for hardware failures. 

Fix 07: Do a Software Update

Updating the software is the best fix for system bugs that restarting cannot solve. The reason is usually software updates contain performance improvements and bug fixes. Therefore, updating the Android system on your device will fix the issue.

Tip: Check our Samsung S21 software update tracker.

  1. Open Settings.
  2. Then, go to Battery and device care.
  3. Tap on “Software update”.
Software update
  1. Then, tap on the three dots at the top right corner. Then select “Download and install”.
Download and install

Fix 08: Clear the Cache

Your smartphone uses a special data type called the cache to save processing power and make your device smooth in terms of performance. However, if the cache files are corrupted or outdated, various problems can occur.

By clearing the cache on your device, you force the device to build fresh cache data, which will fix the problem if the caching is the issue.

Read: Recovery Mode on Samsung Galaxy Smartphones

  1. Turn off your device
  2. Press and hold the power key + volume up key and release them after your device boots into recovery mode.
  3. Navigate to “Wipe cache partition” (Use volume keys) and press the power button.
Wipe cache partition
  1. Confirm.
Confirm wipe cache
  1. After the wipe cache is completed, navigate to “Reboot device now”.
  2. Press the power button to restart the device

After your device is restarted, make a call and see if the problem is fixed.

Wrapping Up

We hope that this guide has helped you troubleshoot and fix the problem of your Samsung S21 calls cutting in and out issue. If you have any questions or need help regarding this guide, leave a comment below.

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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