Mobile phones have indeed changed the world like no technology has ever done before in history. It revolutionalized voice telephony in a very interesting way. In the early 2000s, the number of mobile phone subscribers surpassed the number of landline subscribers. - Back then, it was more about hardware and less about software but now, it has become the de-facto way of communicating in every aspect combining voice and data with some interesting and useful features for home and business users. This could only have been achieved by designing software that makes these handsets smarter and smarter. The introduction of the “smart” phones provided additional impetus for the industry …