If you are a tech-savvy individual, then you must be pretty enthusiastic when it comes to mobile applications. Nowadays, mobile applications are being used in almost every sphere of urban life. Be it shopping, corporate marketing, or optimizing public relations - wireless application protocols are being used everywhere.

While we discuss the popularity of mobile applications, we cannot help but talk about 'iPhones'.

As for the definition, iPhones are high-end multimedia-enabled smartphones which have been designed by Apple Inc. According to Apple, they have managed to sell more than 6.1 million original iPhone units in just over five quarters, after the humble launch of the device in January 2007.

Here's an interesting infographic which showcases the ever-increasing popularity of the smartphone.