The biggest change is on the back of the iPhone 3G, which is now made of smooth but durable black plastic instead of the aluminum back found on the first iPhone. Apple iPhone 3G Black is an update to the popular iPhone 3G, itself an update of the original iPhone. The third generation smartphone is available in 16GB and 32GB varieties, both of which can be had in black or white.The iPhone 2megapixel camera appears to be identical in quality to the original, which is to say pretty good outdoors an...