WeChat : No Text charge No voice charge ,Free Communication:Next generation Multimedia communication

WeChat is a mobile phone text and voice messaging communication service developed by Tencent in China. This is next generation communcation method where you need not to pay for your SMS or you need not to worry about your call rate whether it is STD or Local call.Currently this is available for Android, iPhone, BlackBerry, Windows Phone, and Symbian platforms. Languages supported include traditional/simplified Chinese, English, Indonesian, Spanish, Portuguese, Thai, Vietnamese, and Russian. WeChat is supported on Wi-Fi, 2G, 3G, and 4G data networks WeChat still operates for free all you need to have just DATA pack of your Mobile operator

WeChat provides multimedia communication with text messaging, hold-to-talk voice messaging, broadcast (one-to-many) messaging, photo/video sharing, location sharing, and contact information exchange. WeChat supports social networking via shared streaming content feeds and location-based social plug-ins  to chat with and connect with local and international WeChat users.

Photos can be taken and embellished with artistic filters, captioned and put into a personal photo journal, and distributed to friends. User data is protected via on-demand contact list backup and retrieval to/from a cloud-based service. WeChat claims to provide a social networking platform that emphasizes user privacy and fast response performance.
In India it is being promoted in India via gaming site Ibibo.The app is available in the App Store for iTunes, Google Play Store for Android, BlackBerry App World and Marketplace for Windows Phone.
Currently As of January 2013, it had 300 million.Today  It has influence in Mainland China, HK, Taiwan, South-East Asia, Chinese People areas around the world and westerners.