- Web Tools Wiki Last Update: March 31, 2017

WhatsApp Messenger is one of the popular instant messaging apps for mobile subscription service for smartphones that uses the internet for communication. In addition to text messaging, users can send each other images, video, and audio media messages as well as their location using integrated mapping features. The client software is available for Google Android, Microsoft Windows Phone OSBlackBerry OS, Apple iOS, selected Nokia Series 40, Symbian, selected Nokia Asha platform, and BlackBerry 10. WhatsApp Inc. was founded in 2009 by US citizens Brian Acton and Jan Koum (also the CEO), both former employees of Yahoo!, and is based in Mountain View, California. The company employs 55 people.

WhatsApp uses a customized version of the open standard Extensible Messaging and Presence Protocol (XMPP). Upon installation, it creates a user account using one’s phone number as the username (Jabber ID: [phone number]@s.whatsapp.net). WhatsApp software automatically compares all the phone numbers from the device’s address book with its central database of WhatsApp users to automatically add contacts to the user’s WhatsApp contact list. Previously the Android and S40 versions used an MD5-hashed, reversed-version of the phone’s IMEI as password, while the iOS version used the phone’s Wi-Fi MAC address instead of IMEI. A 2012 update now generates a random password on the server side.

WhatsApp is supported on most Android, BlackBerry, iPhone, and Nokia smartphones. All Android phones running the Android 2.1 and above, all BlackBerry devices running OS 4.7 and later, including BlackBerry 10, and all iPhones running iOS 4.3 and later. However, some Dual SIM devices may not be compatible with WhatsApp, though there are some workarounds for this.

Multimedia messages are sent by uploading the image, audio or video to be sent to an HTTP server and then sending a link to the content along with its Base64 encoded thumbnail (if applicable).

Visit- whatsapp.com

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10 Amazing facts about WhatsApp by @al_hernando #19billion #amazing http://www.slideshare.net/ALHERNANDO/whatsapp-10-amazing-facts-about-it via @SlideShare

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