Samsung Galaxy S21 5G

Android 11.0

I can't make voice calls on my Samsung Galaxy S21 5G Android 11.0

Cause 1 of 2: There's a connection error

If your phone doesn't receive any calls when someone calls you, it may be caused by an unknown connection error.

Step 1 of 2

Restart your phone

Press the Side key.

Step 2 of 2

Restart your phone

Simultaneously, press and hold the lower part of the Volume key and keep them both pressed until your phone restarts.

Press the Side key.

Simultaneously, press and hold the lower part of the Volume key and keep them both pressed until your phone restarts.