Is a cross-platform mobile messaging app, and the king today..
which allows you to exchange messages without having to pay for SMS.
Wasap Messenger is available for iPhone, BlackBerry, Android, Windows Phone and Nokia
WhatsApp Inc. is an early stage technology startup founded in the heart of Silicon Valley. Is a cross-platform mobile messaging app for iPhone, BlackBerry, Android, Windows Phone and Nokia. Send text, video, images, audio..
and yes, those phones can all message each other! Because WhatsApp Messenger uses the same internet data plan that you use for email and web browsing, there is no cost to message and stay in touch with your friends.
Read the conversation of CEO of whatsapp , Jan Koum.