Hey, I just bought an i730 off of someone and every time i try to make a phone call, I get a service restricted error. I cannot connect to the net either, so I think that, too, is tied with this. Whenever i put my SIM card back in my i205, it works perfectly fine. I can make phone calls and sent texts. However, when i put it in the i730 it just won't work. This morning when i tried it, the i730 was working and i could call and text. However, after school I realized it again stopped working. Do you guys have any idea what the problem could be? Thanks a lot.