Probably a silly question but I am looking at used iPhones on eBay and someone is selling a 5S that has the activation lock from iCloud on it. In the listing they claim that this lock appeared a month after they bought the phone on eBay themselves. Obviously if that can really happen it seems worrying to anyone looking to buy a used iPhone, but my question is can that actually happen or is the seller just talking BS because the phone was stolen? It seems logical to me that if the phone is wiped clean before you buy it, then you set it up with your own iCloud account, the previous owner cannot lock it. So if you buy a used iPhone you just need to make sure the previous owner's iCloud account is not still set up. Is that right? Thanks!