The Mobira Cityman 900 was released in 1987 by Nokia-Mobira.^[1] It was one of the first handheld cell phones. The nickname of the phone in Finland was Gorba. This was because the President of the Soviet Union Mikhail Gorbachev used a Cityman phone to talk to the Deputy Minister of Communications Vladimir Glinka in Moscow from Helsinki in October 1989. The call was made by the phone's owner Stefan Widomski, a Nokia executive. It is likely that the phone used was an earlier Cityman 450 model.^[2]

The Cityman 900 has a total weight of 760 g.^[1] The phone measures 183 × 43 × 79 mm.^[1]

• Nokiamuseum.com, Cityman 900
• Salo Museum of Industrial and Cultural Heritage SAMU, Mobira Cityman 900 Archived 2018-06-13 at the Wayback Machine
• Mediamuseo Rupriikki, Mobira Cityman (in Finnish)^{[permanent dead link‍]}