Hi, I recently acquired an Iphone 3GS that was jailbroken. There were still files and contacts in the phone, and being new to Iphones, I clicked Delete All Data which required my phone to be recovered after. I finally figured out how to put my phone in DFU mode and recover it on itunes with the latest iphone software. I need to begin my process of somehow making this phone usable for my T-Mobile network and simcard. The phone is currently asking me to insert the AT&T simcard (which I obviously dont have) and activate the phone. As someone that is new to the Iphone, I am unsure how to approached this. Can you guys help guide me in the right direction to this situation? Thank you in advance.