separate forward-facing camera for face-to-face video calling. The main CPU in this smartphone is an ARM compatible chip (OMAP 1710 (ARMv5 architecture, Arm9 core)) running at 220 MHz, an unprecedented speed for a smartphone at its release. For comparison, the 6600 and N-Gage only run at 104 MHz. Nokia 6638 Nokia 6638 is the first in the world Symbian operating system phone which will work on CDMA networks. In appearance it is identical to the Nokia 6630 which is UMTS/GSM. The only difference is that the 6638 features expandable antenna. Other notable features are Bluetooth, POP3/IMAP support with 1.2 mega pixel camera. It preceded Nokia 6620 and was replaced by Nokia 6682. References External links Support Mobile Review FoneArena Review GSM Arena Review Device details on Forum Nokia Nokia smartphones Symbian devices