It is world of smart phones. New a days demand for smart phone rose and it become need. Lots of mobile apps have been released for smart phones that offers different services and enhance functionality of mobile phone. The most common app in smart phone is a messenger, that is provided with almost all the Smartphones. One such app is “WhatsApp S40 Messenger”.
WhatsApp Messenger is a smartphone messenger available for Nokia, iPhone, Blackberry, and Android phones. WhatsApp uses your 3G or WiFi (when available) to message with friends and family. One can easily switch from SMS service to WhatsApp messenger to send and receive messages at no cost, absolutely free for the first year.
Messenger can be download form Ovi store plus official website of whatsapp.
http://www.whatsapp.com/s40/ and download it from there.
Symbian s60 3rd or 5th edition mobile devices