Hello Lanzhou, I will answer it in detail for you.

Functions: iPhone4 is well known to have a front camera and a 5-megapixel camera on the back, which is a leap from 3. 4 It supports multi-tasking operations. For example, if you turn on music and chat on QQ, 3 cannot do it, but 4 can. The Internet speed of 4 is faster, and the boot speed is faster. The A4 processor used by iPhone4, my friend downstairs also said... iPhone4 The screen is a bit smaller than the iPhone 3 because of the increased resolution. Like other iPhone brands, the 4 still does not support flsh.

Design: Lanzhou should have seen that the back of the 4 is horizontal, which is not the same as the 3. It is sleek (not easy to fall off... I have personally experienced it) and the audio keys below have also been treated with soft plastic and the screen is tempered. The paint is piano paint plus rough treatment.

Technology: A4 processor, The 5-megapixel rear camera is almost like a digital camera. It has three-axis scrolling, which makes the operation more sensitive when playing games. It also supports multi-task operation.

Quality: An American made a video Experiment, the laser shot 4 and 3GS. 4 left a bullet hole, 3 was broken...

The above is my self-explanation for Lanzhou