A computing device needs to run a decent operating sys¬tem. Today, each manufacturer has adopted a distinct operating system. Symbian and
Windows Mobile are the most commonly used ones, while some phone makers use their own proprietary operating systems. Today, a majority of applications are designed for Symbian and Windows Mobile.

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The OS could make a difference in your user experience. For example, Windows Mobile has plen- sym. of applications for GPS devices. Look for online communities that develop such software and the one that suits you. The cost of a phone also depends on the license for the OS on the phone. For commercial applications, look for the pricing well in advance. You might find a particular platform that has the free equivalent software of a commercial package.

'Phe phone may also come with more than the OS. There is a good chance that software like office applica¬tions and Internet utilities will be integrated on the phone. These maybe useful, but are bound to burden the hardware.