I just bought a Z3 D6616 off of eBay that was listed as "Unlocked". To me unlocked means that it will work on other networks, so I did not worry that I was going to use the phone on AT&T. I got the phone today and took it down to get a NanoSim for it (my old phone used a MicroSim). The guy at the AT&T set it up and got the sim installed, and the phone can receive calls, but it has no data service at all. I mean none!. I looking through every article I can find online and they all say that the D6166 is locked to T-Mobile and cannot be configured to receive data on the AT&T network. Is this true? I really like this phone. Is there any hope of fixing this problem? Please!