I have follow all the tutorials in how to unlocked the iphone ,but i keep getting the same thing "no service" and then when i look in the phone in about i see thi thing over the carrier line (carrier (null)(null)). I have done all this with att sim cards I don't know if that might be the problem that every time I put a att sim card this happened. I have read the posts that the other user have ,but no one offer a solution in this matter. I order a sim card from tmobile today ,so i tomorrow i will see if is because of att.
Note: I use att and the reason I want to unlocked is to get a einstein plan ,so i can drop att plan.