My phone does not show who is calling me incoming calls all shows unknown, why is it doing this (Lumia 730)?

[WPCentral Question]

my phone does not show who is calling me incoming calls all shows unknown lumia 730

all incoming calls shows unknown

 

[Harrie-S]

Re: my phone does not show who is calling me incoming calls all shows unknown lumia 730

Go to settings > swipe to applications > phone > and disable "international assist"
This should fix your problem.