The correct answer is False. CDMA2000 can work in both TDD and FDD mode.
CDMA2000 is a 3rd generation (3G) cellular technology that was developed by the CDMA Development Group (CDG). It is a successor to the 2nd generation (2G) CDMA technology, and it is based on the IS-95 standard. CDMA2000 can operate in both time division duplex (TDD) and frequency division duplex (FDD) mode.
TDD mode is a type of duplexing in which the uplink and downlink channels are time-shared. This means that the uplink and downlink channels use the same frequency band, but they use different time slots. TDD mode is often used in areas where there is a lot of spectrum congestion, as it allows for more efficient use of the available spectrum.
FDD mode is a type of duplexing in which the uplink and downlink channels are frequency-separated. This means that the uplink and downlink channels use different frequency bands. FDD mode is often used in areas where there is less spectrum congestion, as it allows for higher data rates.
CDMA2000 is a widely used 3G technology, and it is supported by a large number of mobile devices and networks. It is a reliable and efficient technology that offers good performance in a variety of environments.