Microsoft Lumia 550

Windows Phone 10.0

I can't make voice calls on my Microsoft Lumia 550 Windows Phone 10.0

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 1

Restart your phone

Remove the battery and leave it out for 10-15 seconds.
Insert the battery and turn on your phone again.

Remove the battery and leave it out for 10-15 seconds.
Insert the battery and turn on your phone again.