iOS 5 update, iOS 6 on the way
The iPhone 4 shipped with iOS 4, but can now be updated to iOS 5 via iTunes. This update adds things like a new notifications system and management options, iCloud support, and the iMessage messaging system. You can find a full roundup in Everything you need to know about iOS 5.
Apple has confirmed that iOS 6 will be available for the iPhone 4 in the fall. This will bring lots of new features and a new Maps app, Passbook for tickets, and a host of other improvements. A few things, like Siri and FaceTime on your cellular network, will not work on the iPhone 4, however. You can find out more in iOS 6: What you need to know.
Read more: http://www.digitaltrends.com/apple/apple-iphone-4/#ixzz3k1Ek2r1o
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