Audiovox SMT 5600 / SPV C500 (HTC Typhoon)

I recently purchased the Audiovox 5600 phone from Cingular. Overall I'm pleased with the phone, but I was somewhat disappointed that it does not have Edge capability for data transfer. I changed from the Nokia 6230 which did have Edge and it was quite a bit faster on downloads. It is my understanding that none of the smartphones currently have Edge. Can anyone tell me why this is the case and if there may be an option to upgrade the phone in the future. Just seems like a step backwards in terms of design. Thanks for any information.