|Availability by country||2003|
|Successor||Nokia 3230 (3660)
Nokia 6620 (3620)
|Removable storage||MMC (16 MB included)|
Changes from the 3600/3650 include a conventional keypad (as opposed to the 3650's circular keypad ), and a 16-bit display (as opposed to the 3650's 12-bit display).
Both the 3620 and 3660 are basically the same phone, except that the Nokia 3620, being targeted at the US market, operates on GSM 850/1900, while the Nokia 3660, a European phone, operates on GSM 900/1800/1900.
They use an ARM compatible main CPU (ARM4T architecture) running at 104 MHz.
The replacement for the Nokia 3660 is the Nokia 3230. The 3620 does not have an official replacement, although it was replaced by the Nokia 6620 in AT&T/Cingular's lineup after the merger between AT&T Wireless and Cingular.