What do those people who say that the sound quality of iPhone5 is not good think?

I used five, and after I used four seconds, I didn't regret it as much as the next one said. The function is the same, because the Apple system can be upgraded.

1.The screen of iPhone 5 is 4 inches larger than that of 4s (and now most smart phone screens are large, with high resolution, clearer and more comfortable than poor eyesight).

2. The thickness of the iPhone 5 is much thinner than that of the 4S, and it feels good (many people say that the iPhone 5 has a painted door, only black, which will not happen if your shell is well protected. This will only happen when you are naked. If the landlord doesn't hate white, you don't have to consider painting. )

3. The battery is not enough. Iphone4s battery 1420mAh