they are different in size and shape, can't you replace iPhone 2G case with iPhone 4 case.
yes.
No, The case won't fit. The iPhone 4 screen is 88.9 mm (3.5 in) while the iPhone 5 is 101.6 mm (4 in).
The iphone 4s desigh as same as iphone 4, so you needn't worry about that ,my girl friend's iphone 4s use my iphone 4 case (buy form 708buy.com) all the time, I prove the iphone 4 case is fit to 4s
no the iPod is round and the iphone is rectangular
No it cant fit it . It was designed for the ipod
The Droid Charge. I'd go with the Droid X if I were you though.
Yes, generally speaking a case designed for the Apple iPhone 4 will fit the iPhone 4S as well. However, this is not always the case, due to a revision of the placement of the silence switch. The case manufacturer will typically specify if the product is compatible with both models.
No. The iPhone 5 is physically bigger than the iPhone 3GS.
no the ipod is round and the iphone is rectangular
No as the the shell (body) of the phones are different
No as the handsets are different shapes and size.