Originally Posted by
JPL9869
I think you can dial 611 on the phone and it will connect you with ATT customer service. They should be able to get through to the owner.
and if the phone is locked so you can't turn it on or access any of the information as noted above, call at&t customer service at 1-800-331-0500 as i'm sure there is a way that they can help in i/d'ing the phone by a s/n since they are the provider in the u.s (or perhaps you could pop into an apple store?)