Currently Being ModeratedMay 19, 2012 10:00 AM (in response to isancho2308)
The iPhone 3G did not come with the oleophobic screen coating which comes with the 3GS, 4, and 4S. Also the iPhone 4 has the much stronger glass not present on the 3G and 3GS. The 4 glass will still crack like all glass does, but is stronger and much more scratch resistent. Still got to be careful it is glass, front and back.