According to TNW, Apple is already working on the iPhone 6 and is planning to release it in the middle of this year. TNW stated that a developer had noticed a device named “iPhone 6,1” running iOS 7 being used within Apple Head Quarters.
From the developer logs that we have seen, the app requests originate from an IP address on Apple’s Cupertino campus, suggesting that members of Apple’s software development and app teams are compatibility testing some of the more popular or well-known applications already on the App Store.
Although IOS and device data can be faked, the unique IP footprint leading back to Apple’s Cupertino campus leads us to believe this is not one of those attempts.”