Even the version of Viber for S40 has landed on the Nokia Store is now available for download. As for that intended for Symbian device, it is a beta release and therefore not complete all the functionality and not free of bugs.
The application allows you to send text messages and share pictures and your location. In the future
Viber for S40 is officially compatible with your device Nokia X3-02, C3-00, Asha 302, Asha 300, Asha 303, it is likely that it can also work with other models with the same operating system.