Nokia Prism
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/