The iPhone is bustling with hidden secrets that very few people take advantage of, including a built-in white noise feature to give Spotify playlists a run for their money. Your humble iPhone contains multitudes of hidden features that can make your life considerably easier. From the spy-style trick that lets you listen in on conversations, to the many alternative ways you can use your camera, you’re only using a minimal percentage of your phone’s true power. The iPhone’s white noise feature is hidden in settingsWhite noise, described as a blend of sounds that humans can hear, is scientificall…