If you are not sure what WhatsApp application is all about then here is a quick info -
WhatsApp Messenger is a cross-platform mobile messenger that replaces SMS and works through the existing internet data plan of your device. WhatsApp is available for iPhone, BlackBerry, Android, Windows Phone, Nokia Symbian60 & S40 phones. 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.
As per release info, the new version offers new features including chat backgrounds but I was unable to find chat backgrounds. You can download the version 2.7.1 from the following link. If you want older versions then here they are:
- Download Application Opera Mini v7.0.30697 for Nokia 5800, N97 and X6
- Download Application WhatsApp v2.6.99 for Nokia 5800, N97 and X6
- Stop WhatsApp on Symbian using LeStartStop for Nokia 5800
- Download Application NetQin Mobile Security v5.6.6 for Nokia 5800