After a long ordeal with what turned out to be a defective phone, I ended up with a brand new still in the box Samsung Galaxy Core Prime which I hope to sell. It was never activated, so T-Mobile was unable to do a quick unlock for me. They sent me directions on how to do it myself, but I am totally incompetent at this stuff and I have no idea what to do. (Golden ager here.) I need to make sure it's unlocked to get the best price, so any help would be very appreciated. Should I just sell it as is and say it's "eligible" to be unlocked?? Dumb question: is it even "locked" to begin with, since I never used it? Many thanks.