There are no physical differences externally. You will only "see and feel" a difference if you took your phone apart. The difference people actually notice is that the phone can simply store twice as many apps, music, videos, contacts, books, notes, etc.
How much cost in Bangkok iPhone 3gs 16 & 32 GB
The new iPhone 4s costs 3 different prices. iPhone 4s 16 GB- $199.99 iPhone 4s 32 GB- $299.99 iPhone 4s 64 GB- $399.99 Hope this answer works, and hopefully you get an iPhone soon.
You can choose from 8 16 or 32
The iPhones available right now are the iPhone 3GS 8GB, the iPhone 4 8GB, and the iPhone 4S 16, 32, and 64GB.
16, 32 or 64. Any 3gs iphone accepts iOS4
There are 2 versions: 16 Gb and 32 GB.
it will be $199 for the 16 gb and $299 for the 32 gb model
iPhone 4 models are sold in 8 GB, 16 GB, and 32 GB versions.
18
1, 2, 4, 8, 16, 32
The difference you will see between the iphone 3G/3G S and the iPhone 4 is quite noticable. Especially the design. AS for the iphone 3G,there is no recently used apps bar (multi-tasking), you can't have a background wallpaper on the homescreen. As for the 3G S, you have both of these features. However, the iphone 4 has the Retina display, which the previous models do not. The iphone 4 has facetime (video calling), which the previous model does not. The iphone 4 can do HD video recording, has 5.0 MP with flash. I believe the 3G does 2.0? and the 3G S has 3.0 MP to it. No flash on previous models. Really, you can just go to the iphone section and i'm sure you can compare between the iphone 4 and the 3G S. In US, they do still sell the 3G S model but in 8 GB of storage, each country could be different where they could still sell the 16 GB model or the 32 GB, but very unlikely, unless they have few in stock. iphone 4 comes with either 16 GB or a 32 GB.
16 GB