The difference between Iphone 4 and Iphone 3GS

The iPhone 4 was officially launched on June 7th ,Comparatitive to the previous unlocked cell phones, we will see that the fourth generation IPhone 4 has a great improvement from the form to function.

All the breakthrough technology in iPhone 4 is situated between two glossy panels of aluminosilicate glass — the same type of glass used in the windshields of helicopters and high-speed trains. Chemically strengthened to be 20 times stiffer and 30 times harder than plastic, the glass is ultradurable and more scratch resistant than ever. It’s also recyclable.

On both sides of the iPhone4 is Stainless Steel Band. The band provides impressive structural rigidity and allows for its incredibly thin, refined design. It also functions as both iPhone 4 antennas.

Following is the a simplified comparation between Iphone 3GS and Iphone 4: