Samsung Galaxy Watch4

When flight mode is turned on, all wireless smartwatch connections are turned off, including the mobile network connection.

Solution: Turn flight mode on or off

Slide your finger downwards starting from the top of the screen.

Press the flight mode icon to turn the function on or off.

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If your smartwatch is overloaded, you won't be able to make any calls. It may help restarting it.

Solution: Restart your smartwatch

Press and hold the Home key until your smartwatch restarts.

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The network coverage may differ from area to area. In certain areas it may so low that it's not possible to make calls.

Solution: Try making a call later when you're in an area with better network coverage.

If there's a general problem making phone calls in a certain area, it may be be due to a temporary network error.

Solution: Try making a call later or when you're in another area.

If you have problems making a call to a specific number, the error may be at the receiving end.

Solution: Try making a call to another number.

If you try to make calls to or from foreign countries, roaming needs to be activated on your service.

Solution: Contact Customer Service to check the possibility of activating roaming on your service.

If your number has been suspended, you'll be notified when you try to make a call.

Solution: Contact Customer Service to have your number reactivated.