WhatsApp Messenger is a proprietary, cross-platform instant messaging subscription service for smartphones with Internet access. In addition to text messaging, users can send each other images, video, and audio media messages. The client software is available for Google Android, BlackBerry OS, Apple iOS, selected Nokia Series 40, Symbian, selected Nokia Asha platform and Microsoft Windows Phone. WhatsApp Inc. was founded in 2009 by American Brian Acton and Ukrainian Jan Koum (also the CEO), both former employees of Yahoo!, and is based in Mountain View, Santa Clara County, California. - Source: Wikipedia
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