So I bought an employee an iPhone 3g, and a few days later dude quits. It was on an existing line, which I need to keep. I want to either return the iPhone, or preferably, sell it on Ebay. If I return it to the ATT store, then I'll get my $299 back. And it'll probably take 50 calls to CS to get the line's upgrade eligibility restored, if they'll even do it (been there done that and it was a b***h). But I'd rather sell it on ebay and make some money. My question is this: can I just sell it and then go to the OLAM and cancel the data package even though I've only had the phone a week? When ATT notices that the iPhone isn't being used on that line will they bill me for the difference between the unsubsidized price and the subsidized price that I paid? Advice/suggestions appreciated.