no, they are completely different designs
no because the 3/3gs are curved and the 4 isn't
NO, the iPhone 3GS and 4 are differently shaped.
no why do you think its called trading in?
iOS 5 will be compatible with iPhone 3GS as well as iPhone 4.
Yes, you can put an iPhone camera in an iPhone 3GS provided you have the required skills.
iPhone 3GS. Then the iPhone 4 and then the iPhone 4S.
yes , uu can .
yes
iPhone 4 ,however my father has the iPhone 3GS which is quite good.
No. The only iPhone that has the ability to FaceTime is the iPhone 4.
Iphone 3GS- £399.99 (8 GB) Iphone 4 - £499.99 (16GB) Iphone 4 - £599.99 (32 GB) I would go for the Iphone 3GS because it is cheaper and wider screened. But the choice is totally up to you! Good Luck!