How to transition to FaceTime on your iPhone during phone call
From the onset, the iPhone has supported common features such as mid-call switching to an incoming phone call, creating a conference call between multiple parties and more. These features extend to FaceTime, Apple’s solution for making audio and video calls over the Internet that bypass a carrier’s voice network.
In this tutorial, you will learn how to make a quick transition to a FaceTime call on your iPhone without hanging up on the current call.