Wikipedia says CDMA uses 3 rates, 8.5kbps, 4kbps, and 0.8kbs at the sender's choosing. It averages about 6kbps, so the numbers are about the same. There are imp

Wikipedia says CDMA uses 3 rates, 8.5kbps, 4kbps, and 0.8kbs at the sender's choosing. It averages about 6kbps, so the numbers are about the same. There are improved codecs, but I can't tell if they are in use. The 0.8kbps is just for encoding background noise when the person is not talking.