rates and lower latencies (see TIA-856 Rev. B below). The upgrade from EV-DO Rev. A to Rev. B involves a software update of the cell site modem, and additional equipment for new EV-DO carriers. Existing cdma2000 operators may have to retune some of their existing 1xRTT channels to other frequencies, as Rev. B requires all DO carriers be within 5 MHz.

EV-DO Rel. 0 (TIA-856 Release 0)

The initial design of EV-DO was developed by Qualcomm in 1999 to meet IMT-2000

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