Designed by leading designer Rocky S, Nokia, on Monday,  launched its new Prism collection of phones with unconventional designs aimed at style-conscious consumers. The collection consists of Nokia 7900 Prism and Nokia 7500 Prism handsets which combine individual style and state-of-the-art technology. Nokia also announced its tie-up with Rocky S to create an exclusive collection inspired by Prism collection, showcased at Wills Lifestyle Fashion Week in New Delhi.