Can we draw the following hypothesis from the context? 

Context:

How to turn off speakerphone<br>Turn off speakerphone during a call. It is important to know how to turn off speakerphone during a call without hanging up on the caller on the other end. [substeps] Tap the round, highlighted speaker button on your iphone screen.

Hypothesis: the button to turn off speakerphone is highlighted on the screen