I bought the HTC Aria from Best Buy since they have no restocking fee, and no rebate hassle. Although, I'm starting to gain more interest in the Captivate. I'm thinking about returning my Aria at the end of my 30 day trial, and having my contract reverted back. After my eligibility returns (they said it takes a few days for it to show in the system), I'll get the Captivate. But if within the next 30 days, I find that I'm not happy with the Captivate, can I return it and revert my contract with AT&T again, or is it a one-time thing? Also, if I can do it again, how many times can I do it?