i think he mean the caps

lets help the guy
check the screen, check the serial number, check the lock, volume, silent buttons, the rest will be WYSIWYG

check internally from in the phone settings>genera>about
and also the backplate of the phone see whether it matches or not
xxx xx ........4th and 5th is the produce week, you could roughly figure out how old is the phone

what you see is what you get