Apple iPhone 4 (2010)

The Apple iPhone 4 (2010) introduced the Retina display at 326 pixels per inch, making individual pixels invisible—a sharpness that is 40% denser than the average screen of 2010. Its debut of FaceTime video calling and stainless steel antenna design pushed design boundaries, and despite Antennagate, it sold 1.7 million units in its first three days. This launch outperforms #4 by tripling the HTC Dream's six-month sales in just 72 hours.