iPhone 3GS Vs iPhone 4 (Source: geeky-gadgets.com)

The iPhone 3GS comes with a 480×320 display and 163 ppi resolution while the iPhone 4 offers a 960×640 Retina screen and 326 ppi  resolution. As a result, this section is won by the iPhone 4. When it comes to the video calling feature once again the iPhone 4 gains points in front of the iPhone 3GS, because the iPhone 4 provides the Facetime application.

When it comes to the cameras available on both devices, there is a similarity: both cameras have autofocus. Unfortunately, the iPhone 4 wins again because it has a camera with more megapixels (5) than the iPhone 3GS (3). Moreover, the iPhone 4 offers a LED flash, a front camera with VGA resolution used for Facetime and backside illuminator sensor. The confrontation between the iPhone 3GS and the iPhone 4 continues with the video recording feature. The iPhone 3GS provides VGA video recording while the iPhone 4 comes with HD recording. In addition, both iPhones allow you to focus and tap while you are recording.

iPhone 3GS Vs iPhone 4 (Source: blogcdn.com)

Both devices features GPS, Accelerometer and Wi-Fi, but the iPhone 4 has more additional features including Dual-mic noise suppression, Apple A4 chip and three-axis gyro. When it comes to the battery life, in a duel between the iPhone 3GS and the iPhone 4, the winner is the iPhone 4. That’s because the iPhone 4 offers you two more hours of talk time than the iPhone 3GS and 10 more hours of audio playback. Regarding the prices of these iPhones, the winner is uncertain, because even if the 3GS is cheaper than the iPhone 4 by purchasing more additional features to reach the features available on the iPhone 4, you will definitely have to spend more money. The iPhone 3GS is available for $49 with a two year contract while the iPhone 4 is listed at $199 (the 16GB model) or $299 (the 32GB version) with a two year contract.