To operate a computer or a mobile there should be an operating system installed. This operating system is the interface between your mobile phones hardware and software. There are many operating systems introduced and many are been used in the recent eras phones. One of the major manufacturers of operating system is by the Microsoft Corporation. They are introducing new features so as to keep in pace with their competitors. They are making this so that customers find it easy to operate the phones and till date has introduced six different versions. These operating systems are improved looking at the customers needs. The latest one released was been questioned by many if it would reach the customers level of expectation. Microsoft Corporation has introduced six different versions of mobile operating systems. The first one of its kind is Microsoft Mobile 6.x. this was very soon succeeded by the next version Microsoft Phone OS 7.0 because of the growing customer demands. Due to the rising need of enterprise Microsoft launched the third version i.e. Windows Embedded Handheld 7 OS. They launched the fourth version for TVs kiosks etc. Called Windows Embedded Standard 7 OS. The fifth versions sets a platform for net books and tablets called as Windows 7 OS. They are working on the next version that will reduce the battery usage and thus increase the efficiency of the phone. This is yet to be released, but then they are planning to launch by the year end. This operating system will be called as Windows Embedded Compact 7. Most people might wonder why Microsoft is launching so many operating systems. They rather work on one platform and not worry about anything else. They always try to manufacture operating systems that user friendly and which can satisfy the customer’s needs and expectations. They try to improve there service on the basis of what customer expects. Due to the growth of many industries like aviation, business management, health care and so on, they have to improve their system in order to compete in the market. There are many mobile phones that are running with Microsoft operating systems. Hand sets like Motorola, Nokia, Honeywell etc. is using this operating system. For any software to work on a mobile phone there should an interface that can talk to the hardware. This interface is the operating system. For instance the GPS system to work, the mobile phone operating system should be compatible with the version of GPS software. The windows embedded compact 7 OS has the platform for applications like GPS to work on. This is yet to be released by Microsoft. With the introduction of Apple and Google operating systems which has more features than Microsoft OS is a big threat to this company. Visit sim free mobile phones site to read unbiased reviews on Toshiba sim free mobile phones, i-mobile, Philips, HTC and Nokia sim free mobile phones.