WhatsApp Messenger is a FREE messaging app Whatapp is nice messenger application I have using it since from 2010 on symbian device.It given better performance .It contain sending message, video, audio, any file which they can support nowadays they launching audio and video calling.Also looking of appliction is nice It will work on android, windows, ios, symbian devices.It will work on 2g, 3g, 4g as well as wifi network of your device it is very usefull to send and recive data or msg in form of audio and video I Recommeded to all user use it for work or business