Help and Support for
Microsoft Lumia 550
Windows Phone 10.0
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I can't make voice calls on my Microsoft Lumia 550 Windows Phone 10.0
Cause 1 of 13: Not sufficient network coverage
The network coverage may differ from area to area. In certain areas it may be 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. View our network coverage map.
