Just a quick heads-up: iOS 7 ( read all about it here ) is finally available for all users. Devices compatible with iOS 7 include: iPad 2, iPad mini, iPad 3, iPad 4, iPod touch 5th gen, iPhone 4, iPhone 4S, iPhone 5, iPhone 5S, and iPhone 5C. Although Apple says is compatible with all devices, owners of older devices should stay away from this update for now due to bugs and maybe a slow user experience. Also, JAILBREAKERS should stay away from this update if they value their jailbreak.
You can download and install iOS 7 via iTunes or directly on the device via OTA ( over-the-air ). PS: also download and install iTunes 11.1