The Nokia 7900 is a

mobile phone A mobile phone or cell phone is a portable telephone that allows users to make and receive calls over a radio frequency link while moving within a designated telephone service area, unlike fixed-location phones ( landline phones). This rad ...

produced by

Nokia Nokia Corporation is a Finnish multinational corporation, multinational telecommunications industry, telecommunications, technology company, information technology, and consumer electronics corporation, originally established as a pulp mill in 1 ...

and announced on August 7, 2007. It is part of Nokia's Prism Collection. It runs S40 5th Edition. It is a quadband phone and has WCDMA on 850 MHz and 2100 MHz. The screen is powered by

OLED An organic light-emitting diode (OLED), also known as organic electroluminescent (organic EL) diode, is a type of light-emitting diode (LED) in which the emissive electroluminescent layer is an organic compound film that emits light in respon ...

technology, Nokia's first, and has a resolution of 320x240 pixels showing 16 million colors. Included is a 2-megapixel camera with flash, an 850mAh battery, and 1 GB of on board memory. Dimensions are as follows: 112 x 45 x 11.3 mm; 101 grams. There is a Nokia 7900 Crystal Prism, which has the same features, but the material of the casing is different.

References

Information Source
{{Nokia phones 7900 Mobile phones introduced in 2007 Mobile phones with user-replaceable battery Series 40 devices