How to Identifying iPhone models

'Apple iphone 2g 3g 3gs Explained'

IPHONE 2G

:SILVER BACK CASING
:MEMORY CAPACITY 2 GIG,4 GIG,8 GIG AND 16 GIG




IPHONE 3G

:HARD PLASTIC BACK CASING WITH AVAIL COLORS ( BLACK AND WHITE )
:MEMORY CAPACITY 8 GIG AND 16 GIG ONLY






IPHONE 3GS

:HARD PLASTIC BACK CASING WITH AVAIL COLORS ( BLACK ONLY )
:MEMORY CAPACITY 32 GIG
:ALREADY ON 3.0 VERSION