My smartphone will not let me know i hsve a call when i am on face book.

[iMore Question]

Tonight I was on facebook and missed two phone calls...did not ring or show notification I had a call...can this be fixed ? Thank you...Shirley..

 

[SwitchBeach]

Way more information needed.

What "smartphone" do you have?
Is the ringer turned on?
Is the volume sufficient?
Do you have any "Do Not Disturb" functions enabled?
Is any mute switch on?
Do you have a sufficient cellular signal connection?