i Just brought a damage iPhone from trademe. the selling claim that its a 3GS but when i had a closer inspection ( taken it apart) i discovered that its just a 3G iPhone.
i was just wondering if there is any different from the back cover between 3GS and the 3G as this is the only proof i got to show them that its a 3G iPhone?
if anyone got a Genuine 3G and 3GS phone please post some photo of the back cover( black only please)

Thank

San