ios7-update
iOS 7.0.4 includes bug fixes, security patches, and a slew of new features and software improvements.  

The update also fixes a major problem for some, which caused FaceTime video calls to fail. iPods that are not able to upgrade to iOS 7 have their own version to upgrade to, iOS 6.1.5.

The new update improves iCloud Keychain, which was introduced in iOS 7.0.3, and the latest version of the desktop software, OS X Mavericks. The cloud-based technology keeps the Safari browser’s passwords and credit card data in sync across all your Apple devices.

Secondly, in Spotlight, the device’s internal search engine, Apple has brought back the ability to search Google and Wikipedia from the results. The two services were removed when iOS 7 was first released in mid-September.

The software update applies to the iPhone 4, iPhone 4S, iPhone 5, and the two new smartphones, the iPhone 5c and 5s. It’s also available for the iPad 2, the third and fourth generation iPads, iPad Air, iPad mini, and iPad mini with Retina Display. Fourth and fifth generation iPod touch models also receive the update.

Also on Thursday, Apple released a corresponding update to its Apple TV, updating the set-top box to version 6.0.2.

Users can update to the latest version by accessing the device’s Settings, selecting General, then Software Update. In spite of the relatively small size of the update, it’s recommended that users use Wi-Fi when updating.

Source