Originally Posted by infernox
So that I have my facts correct...let me summarize and pls correct me if I am wrong. See graph below. It's taken from a Cingular presentation. This is for U.S. based carriers.
- UMTS / HSDPA devices or networks will allow you to conduct voice AND data simultaneously. Currently in the states, that's a GSM technology carried by T-Mo and Cingular. The speed is up to 3.6 mbps. The latency is 100-200 ms
- EVDO Rev. A is coming out from Sprint and promises faster speed than Rev. 0 but however won't support true voice AND data transfer simultaneously with playing around with VOiP technology. It's a CMDA technology. The speed is up to 2.4 mbps and latency is 250-350 ms. http://static.flickr.com/114/295864903_e0d2a56a50_o.jpg
I don't believe that diagram is comparing to Rev. A.