Apple iPhone 4S mobile was launched in October 2011. The phone comes with a 3.50-inch touchscreen display offering a resolution of 640x960 pixels at a pixel density of 326 pixels per inch (ppi). Apple ...
Headquartered in Cupertino, California, the consumer electronics giant entered the smartphone market with the iPhone in 2007, and the tablet market with the iPad in 2010, and the smartwatch market ...