What frequency is used in CDMA based cellular communication?

In the United States, there are the four major frequency bands in use:

CDMA 850 is CDMA technology operating in the Cellular (850 MHz ) frequency band. Before the existence of GSM 850, the Cellular band was often referred to as the “800 MHz” band. “850 MHz” implies a different frequency band, but the two are often used interchangeably.

How Does CDMA Work? CDMA allows up to 61 concurrent users in a 1.2288 MHz channel by processing each voice packet with two PN codes.

A CDMA channel is a pair of 1.25MHz frequency bands separated by guard-band . The guard-band may be 45 or 80MHz wide. The pair of 1.25MHz band is located either in the 82-893 MHz range in case of cellular CDMA or in the 1850-1989 MHz range in case of PCS CDMA.