Please help! Locked iphone 4s, don't know what carrier it is locked to.
So I recieved an Iphone 4s as a gift, and the phone is supposed to be locked to Rogers. With a Rogers sim in it, it says that the sim is invalid and to check the provider (so I figure it must be locked to some other carrier).
The person who gave me the phone doesn't know because he was told that the phone was locked to Rogers when he bought it.
Is there any way that I can find out the carrier of the phone without having to put in different carrier sim cards to figure out which one works? I would really like to find out so I can at least sell the phone if I can't use it!
Or if anyone were able to tell me how to unlock the 4s (I realize there is no untethered unlock/jailbreak atm).