Use of Mobile or handheld devices is very common today. When plan to buy a mobile whether it is new or preowned people are going through certain parameters like color, size, features, quality of camera, processor and memory. But, the most ignored or less cared part is operating system. This research paper highlights upon the existing and obsolete operating systems as well as their features and limitations. Paper compares the various mobile operating systems w.r.t. different crucial parameters like, basic features, browser, communication and connectivity, language and inputs, maps and navigation and privacy and security issues with most popular mobile operating systems.
Key words: Mobile Operating System, smartphone, handheld operating system, Android, iOS, Symbian, Windows, Blackberry
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