Some iPhone owners who jumped to install the iOS 4.2 firmware update yesterday were greeted with an unwelcome surprise. Media including music, audio books, podcasts and videos disappear after the update is complete. iTunes still displays the storage space occupied by the media files, but they are nowhere to be found on the iPhone.
Opening the iPod app simply says "No Content" and re-syncing with iTunes does not bring back the media library! Apparently something was overlooked by Apple, but lucky for iPhone owners the bug fix is quick and easy. Your music files are hidden but still stored on the device. Don't restore your iPhone or take drastic measures, just follow these simple steps: