I went to a T-Mobile store and I'm a current customer. I had an AT&T pre-paid that expired, so I wanted to use my iPhone 5 and sell the iPhone 4 I had. Of course, I didn't mention the iPhone 5 because they would most likely upgrade my plan. I took in my free SIM since T-Mobile likes to give them away. They cut it wrong and wanted me to pay $20 for another one. I don't know how they cut it wrong but they did. I asked for another SIM (he hesitated and gave me another one) and they activated it. Of course it didn't work. I was fed up and went home. I cut my own Nano SIM and activated it over the phone. Within 5 minutes I was up.