Diffrence between iphone 3gs and iphone 4

1. The iPhone4 is capable of video calling while the 3Gs is not

2. The iPhone4 has a better camera compared to the 3Gs

3. The iPhone4 has better resolution than the 3Gs

4. The iPhone4 supports 802.11n while the 3Gs does not

5. The iPhone4 has a gyroscope while the 3Gs does not

6. The iPhone4 is equipped with a more powerful processor and more memory than the 3Gs

overclock iphone 3g

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