The Nokia Prism is a fashion mobile phone collection produced by Nokia. All models run S40 5th Edition user interface.
As for 2008, the collection includes the four handsets: Nokia 7070 Prism (low-end phone, released 4Q 2008) Nokia 7500 Prism (mid-range triband phone, released 3Q 2007) Nokia 7900 Prism (hi-end quadband phone, released 3Q 2007) Nokia 7900 Crystal Prism (luxury version of Nokia 7900 Prism, released 4Q 2007)
References
http://www.intomobile.com/2007/08/07/nokia-prism-collection-the-7900-and-7500-are-official.html Information Source http://www.nokiaprismcollection.com/