Some people may choose to forget or overlook it, but one of the main functionality of the iPhone is the ability to make and receive calls. Sure, the iPhone may have advanced media and web browsing features but it is still essentially a smartphone which is going to be used primarily for incoming and outgoing voice calls. The FakeHistory tweak that has landed on Cydia store doesn't directly influence phone calls, but does allow users to modify the call history that shows up within the Phone app.
