There are a surprising number of hidden features in your iPhone's Phone app, from secret dialer codes that provide info or perform actions to special characters that make dialing extensions automatically. However, there's one little-known trick every iPhone owner should know when using the Phone app for calls — and it's the simplest and most useful of them all. Whenever you're in the middle of a phone call and need to step away for a moment, whether it's to use the bathroom, silence a coughing fit, or yell at somebody in another room, you can tap the mute button for the microphone on Phone's... more
