International Journal of Engineering Innovations and Research (IJEIR)
Mobile phones are used by every people in today's life. The authors use mobile phones without knowing the different factors that a mobile used including its technology, operating system, CPU, RAM etc. Many types of operating system are used by different mobile. Every operating system has their advantage & disadvantage. Some of the operating system includes many advanced features like multitasking, live wallpaper, messaging, internet browsing etc. This paper discuss the features of various mobile OS start from their emergence and a small history of mobile phones which show how mobile phones are introduced from scrap.