Microsoft claims to have added over 500 new features in Windows Phone 7.5. Of these the key additions are: Custom ringtones, visual voicemail, new speech commands, Linked inboxes, conversation view in email, multitasking, video sharing, picture tagging, Smart DJ and sync with SkyDrive.
Another new feature called All Windows Phones, gives users the ability to use any web browser to log in to and locate their lost phone on a map, have it sound the ringer, lock it, or wipe it.
The conventional application icons have been replaced by Live Tiles on the Windows Phone start screen. The Live Tiles come to life with real-time updates from the Web such as news, appointments or the status of friends. The integrated experiences are achieved through 'hubs' which bring together related content into a single view to simplify common tasks. These Hubs include, People, Pictures, Games, Music & Video, MarketPlace and Office.
With Windows Phone 7.5, Microsoft's Web Marketplace also makes its debut in India. This gives Windows Phone users the opportunity to surf for apps online just like Android and iOS users.
HTC Radar sports a 3.8-inch LCD touch screen display and is powered by a 1 GHz Snapdragon processor.
A dedicated camera button provides easy access to the Radar's 5-megapixel camera, even if the smartphone is locked. It comes in at 4.7 by 2.4 by 0.4 inches, and has 8GB of on-board storage. It packs 1520 mAh non-removable battery, which is claimed to last up to 10 hours of talktime on GSM and up to 8 hours on 3G. The smartphone is priced at Rs 23,999.
Another Windows Phone 7.5 phone unveiled recently is Samsung Omnia W i8350. The smartphone is priced at Rs 19,990.