So i'm trying to unlock an iphone for my sister, because she sucks at this stuff. But I don't own an iphone or anything so I have no idea what to do. Apparently she bought the iphone from a friend who had already unlocked it, so they put in their t-mobile sim card. Recently, they downloaded an iphone software update but it locked the iphone, so now i need to figure out how to unlock it again. It's a 3g and they only have a t-mobile sim card. Sorry If i'm not giving adequate info, once again, i know nothing about this stuff. It has to be free too! If there are any free ones out there...idk.
Any help would be appreciated! Thank you.
Any help would be appreciated! Thank you.