Raicya's reply to my problem was immediate & extensive. And I am saving it bkz there are many ideas for future use. However, since I mentioned that my iPad received calls & were clear I have to rule out all info regarding my WIFI.
(And it was in the back bedroom, not as close as my phone was to the wifi signal.)
I didn't mention that I did check to see if I was on the WIFI connection on my iPhone. I bring this up in case someone else is having the same issues & that Raicya & fellow experts might look beyond this issue. Thanks to all of you who have the knowledge and information and are willing to share it. I am grateful.