One of the dumbest criticisms that Apple haters lob at the iPhone is that Apple has essentially released the same device over and over again for the past seven years. Even a passing glance at the design differences between the devices reveals huge differences, not to mention the constant improvements to the device that Apple has made with both its software and internal hardware. To take just one example of the iPhone's constant improvement over the years, consider this terrifically detailed comparison produced byCamera+ and MagiCam cofounder Lisa Bettany that shows pictures taken with every single major iPhone model released so far.
Check out this incredibly detailed comparison of photos taken by every single iPhone model