Nokia 3620/3660

The Nokia 3620 and 3660 are successors of the Nokia 3650 smartphone. Both run on Nokia Series 60 version 1.x (and the Symbian operating system).

Improvements over the 3600/3650 include a conventional keypad (as opposed to the 3650's much-hated circular keypad), and a 16-bit display (as opposed to the 3650's 12-bit display).

Both are basically the same phone, except that the Nokia 3620, being targeted at the US market, operates on GSM 850/1800/1900, while the Nokia 3660, a European phone, operates on GSM 900/1800/1900.

Both of them use an ARM compatible main CPU (ARM4T architecture) running at 104 MHz.