Change in volume when calling PI.

I noticed a change in volume when calling PI. I have to hold it up to my ear to hear him. Before the volume was perfect. It seems to go through the ear piece when you call PI. Before it automatically went through the phone's speaker. Now, the only way to be able to have PI on speaker is to text PI and click the speaker button at the top.

Is it possible to have a speaker button option when using the call feature? Thank you.