RT @waxpancake: 1. Start a FaceTime video call. 2. While it's still ringing, swipe up from the bottom of the screen and click "Add Person." 3. Add your own phone number to the call. You'll now be able to hear the microphone from the other device, even if the owner is nowhere nearby.

http://twitter.com/shaunking/status/1090066835679137792