Device Guides

Microsoft Lumia 640

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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 off flight mode.

Possible cause 1:

Flight mode is turned on

Solution:

Turn off flight mode.

1. Find "flight mode"
Slide your finger down the display starting from the top edge of your mobile phone.
Tap ALL SETTINGS.
Tap flight mode.
2. Turn flight mode on or off
Tap the indicator next to "Status" to turn the function on or off.
3. Return to the home screen
Tap the home icon to return to the home screen.

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