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Samsung Galaxy S21 5G

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Android 11.0

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I can't make voice calls

This troubleshooting guide will take you through a number of possible causes
to help you find a solution to your problem.

Turn on automatic network mode selection.

Step 1 of 7

1. Slide two fingers downwards starting from the top the screen.

Step 2 of 7

2. Tap the settings icon.

Step 3 of 7

3. Tap Connections.

Step 4 of 7

4. Tap Mobile networks.

Step 5 of 7

5. Tap Network mode ‹SIM›.

Step 6 of 7

6. Tap the required network mode.

Step 7 of 7

7. Tap the Home key to return to the home screen.

Did this solution solve the problem? Yes No

Possible cause 4:

The selected network mode is not available

Solution:

Turn on automatic network mode selection.

Find "Network mode ‹SIM›"

Slide two fingers downwards starting from the top the screen.

Tap the settings icon.

Tap Connections.

Tap Mobile networks.

Tap Network mode ‹SIM›.

Select network mode

Tap the required network mode.

There may be different network modes available depending on where you are. If you set your mobile phone to the fastest network mode, it will always find the network with the highest data speed and best signal.

Return to the home screen

Tap the Home key to return to the home screen.

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