iPhone 4G is now on track of selling in whole over the world. According to the official website of the Apple I come to know iPhone 4G will release date is in month of July. It's marketing will done as per inner circle of the Steve Jobs. iPhone 4G having some new features which will attract you people to buy this mobile. If you having this iPhone 3GS then you should come to know what is the difference between the iPhone 3GS and iPhone 4G and what benefits will be there after buying this iPhone 4G. As per the price point iPhone 3GS (8GB) having $99 while iPhone 4G (16 GB) having price $199 and (32 GB) having $299.

Here are some most important factors using which this comparison is done which is as per the follow :

Features	iPhone 3GS	iPhone 4G
Processor	600 MHz	1GHz
RAM	256 MB	512 MB
Battery (Talk Time)	5 Hours	7 Hours
Storage	8GB	16GB,32GB
Camera	3 Megapixels	5 Megapixels front and back cameras and inbuilt flash
Video Recording	VGA (Tap to focus)	HD (Tap to focus, LED light, Backside illumination)
Resolution	480 x 320, 163 ppi	960 x 640 , 326 ppi
Size	115.5 x 62.1 x 12.3 mm	115.5 x 58.6 x 9.3 mm
Weight	135 Grams	137 Grams

These much is not enough but with this improvement iPhone 4G having other additional features and they are listed as below : Second microphone for noise cancellation

• Front facing camera for "Face Time" video calling
• 3 axis gyro - more motion getstures for better gaming
• Stainless steel band which itself act as antenna which creates more internal space
• iOS 4 operating system which allows multitasking

So this is the difference between 3GS and 4G. And one other is iPhone 3GS be available in black color while iPhone 4G will be available in black and white color.

Here you can look at the hand made comparison chart by Mahalo and other you can read from the official website of the apple.com .