Unlike desktop OS's there is a big competition between mobile OS. because there are number of popular OS's in the field. Microsoft won the game in desktop , but it seems they loosing it in mobile OS field. Microsoft launched the Windows phone 7 OS with a big hope but even now it seems it's bit difficult to fight with others. therefore unlike Android phones, Windows 7 phones are rare.
however HTC HD7S is a one of the super phone which comes with Windows phone 7 OS. it's a super phone which has high end features. it has a huge 4.3 inch S-LCD capacitive touchscreen and the screen resolution is 480 x 800 pixels. HTC HD7S has Dolby Mobile and SRS sound enhancement feature so you can enjoy a cinema experience with it. the internal memory of this phone is 16GB and it supports up to 32GB memory cards. it has a 7.2Mbps HSDPA modem and has wi-fi and bluetooth.
HTC HD7S has a 5Mp camera which supports 720p video recording. the camera comes with a duel LED flash and supports geo-tagging feature. also HTC HD7S powered by a 1 GHz Scorpion processor and it has a Adreno 200 GPU. as other features HTC HD7S has a GPS receiver and a digital compass. the Windows mobile OS has built-in social networking features so you don't need to install facebook and twitter apps separately.