The iPhone 4 16GB unlocked mobile offers you the brilliant touch screen technology. The Apple iPhone 4 Black Sim Free has got the 3.5� widescreen Multi-Touch display which supports a very high density of pixel resolution. The phone has got the best image capturing camera of 5 MP. Moreover, the device also comes with video calling facility. However, even after boasting so many unique & innovative features, the iPhone 4 price is quite inexpensive as compared to other mobiles in the category.