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Nokia Series 80 is a platform for enterprise and professional level mobile phones made by Nokia. It uses the Symbian OS. Common physical properties to this Symbian OS user interface type is a screen resolution of 640 x 200 pixels and a full QWERTY keyboard.

Current Nokia Series 80 phones:

Nokia 9210 (S80 v1.0)
Nokia 9210i (S80 v1.0)
Nokia 9290 (S80 v1.0)
Nokia 9300 (S80 v2.0)
Nokia 9300i (S80 v2.0)
Nokia 9500 (S80 v2.0)

Nokia Series 90

Nokia Series 90 is a platform for mobile phones that use Symbian OS. It is developed primarily by Nokia and currently used only on the Nokia 7710.

Essentially, Series 90 is a development of the Psion Eikon GUI as used on the Series 5, Series 5mx, Series 7 and netBook machines. It has been modified to be controlled entirely through the touchscreen, supplemented by the 77x0's seven hardware buttons and rocker-dial. The Nokia 7700, which was never released, had only an on-screen keyboard for text input; the 7710 added basic handwriting recognition. Applications now have only a single menu tree, accessible from the title bar at the top of the screen; there is no Exit or Quit option in most apps; and a button bar has been added to the right hand side of the screen, resembling that of the Nokia Communicator smartphones.

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