Why can't I see who's calling me on my Alcatel One Touch Fierce XL?

I cant see whose calling me on my alcatel one touch fierce xl.  I have to press the phone icon then select return to incoming call?  how do I change it to see incoming calls?

I recently had this problem and stumbled upon the solution. Go to settings > device > sound and notification > app notification > call > make sure "block" is unchecked. This should resolve it.

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