I hope how I say this makes sense.
Dave and I are both we cingular we love it. This summer when his account was eligible for an upgrade on the phone we did it thru Amazon. He had been wanting a Krazr forever, well since we upgraded thru Amazon (which will automatically give you a new two year contract) the phone was 1 penny....yes you didnt read that wrong, we got it for 1 cent, plus the 18 dollar upgrade charge that cingular charges. Going thru amazon you can pick the plan you want there is not one in particular you have to go thru and the phone is MUCH cheaper (and the same phones, they have a boat load to choose from) that upgrading it through Cingular themselves.
I was skeptical at first, but when all was said and done, getting the Krazr cost us a grand total of $18.01
Its worth checking them out. I just checked it out, and the phone you linked to is available for a penny too (as is the 580i) (not all phones are that low, there are MANY to choose from)
http://www.amazon.com/b/ref=amb_link...pf_rd_i=301185
that link should take you to the page you need to start on, if for some reason it doesnt, go to
www.amazon.com then on the left click on Cell Phones and Service then, on the left again, click on At&t (since its not really cingular anymore) and you can look at where to go from there
(and for anyone not with cingular they handle the other services to, but since Im not with them Im not sure on the price deals, I've only ever looked at Verizon for a co-worker, and they were almost just as good for that carrier too)