I have a Motorola Moto X through US Cellular and I am desperately looking how to carrier unlock this phone. I don't know if its CDMA or GSM but it has a Sim card. It was hooked up through US Cellular and I would just go there and get a prepaid Sim card and use that but they said that I couldnt because it was still connected to my friends US Cellular account and he is in jail. The phone doesnt have service and I have been desperately looking how to unlock this phone. I cut I micro AT&T Sim to a nano Sim and put it in hoping to get the option to enter unlock code and all it says is "Sorry unknown Sim has been entered" I'm completely stuck and dont know what to do any help or insight would be greatly appreciated. Thanks guys!