answer:Presumably the former owners don’t remember the passwords ? I think your best bet would be to first contact ATT to find out which area code and telephone number was associated with which phone. Each iPhone also has a unique serial number (listed in Settings) assigned to it. Once you have that info, then call 1–800-MY IPHONE and request a product specialist and ask them what to do. As long as they can verify your proper ownership of the phone, there shouldn’t be a problem. But routinely they ask for the area code and phone number and the particular iPhones serial # each time I’ve called in (presumably to insure against stolen iPhones.)