I sold my 8gb 3rd gen ipod touch, to buy a iphone 3g 16gb(no xtra money needed)so I could try out the android os on the iphone, but since i'll be getting an iphone and i have no phone of my own. I decided I might as well get a prepaid plan as well. I've searched Google and I couldn't find any answers to my questions. How would I go about buying a sim card for a pre-paid plan? Do I just walk into an ATT/T-Mobile phone store and request a sim card for a pre-paid plan and put money on it? What requirements are there besides jail breaking and unlocking the Iphone? Do I have to do something special to the SIM Card?