Does it Make Sense to Buy an 8GB iPhone? – International Business Times

The iPhone 3GS has only a 3-megapixel camera, and its video camera doesn’t record in HD. The 3GS lacks the 3-axis gyroscope of the iPhone4 and 4S, but has an accelerometer. a gyroscope can sense how a device is being rotated around many axes, where an accelerometer has a fixed axis and can only measure …