Okay so about a week ago my cousin gave me his AT&T iPhone4 because he was gonna get the iPhone5. I then went to www.straighttalk.com and ordered a simcard and got the 45$ month plan, the phone worked, then I decided to trade my iPhone4 for a HTC One X (AT&T) and so logically I assumed I could just pop in the simcard I had in the iPhone4 and it would work,...well its not working and I need help. When I try to make a call on the new phone it will say that my "The device has been blocked from network use", I don't have the iPhone4 anymore, the phone has bars as if it were connected as well as displaying "HOME" on the top (HOME=Straight Talk) so yea, I want to port my number to my new phone and I want to know if I will need to get a new simcard, or if I should just call them? I tried calling once and those indian outsourcing people (no offense) have no idea what my problem is, and they digress/backtrack all the time its annoying lol. Someone please help me!