There is no contract, you are purchasing the phone outright, it clearly states "No Contract" below the price. Or you have the option to pay $0.00 with a 2 year agreement. There is no ETF if you purchase the phone outright, the most you will pay is $79.99 for the phone and maybe a prorated amount of a few dollars for the 2-3 days of service you'll be charged for before you get the phone. Might not even get charged that, I don't know. I also read that if you cancel within three days, you will not be charged an activation fee as well. It would be no different than I you brought a phone to att, activated it and then canceled the plan a few days later.
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