chipmunk shows MD645 for mine too, however on the device in Settings it is listed as ND643LL
http://www.chipmunk.nl/cgi-fast/applemodel.cgi
Hi
My replacement says ND296LL, I have a 32gig white phone for AT&T
and my push notification does not work on my new device. So I'll just keep my old one since push has benn working fine on that. Difference between the two s I restored software on old one and not new one.
New one came in white box no accessories.