The 3110 is a GSM mobile phone handset manufactured by Nokia in Hungary, introduced at CEBIT in March 1997. The 3110 is notable as the first Nokia handset to feature the 'Navi-Key' (a.k.a. D-Pad) menu navigation system. The Navi-Key was featured heavily on Nokia handsets, especially the entry-level models such as the Nokia 1100 in the following...