Return or exchange for a new machine.

But the activation date is not enough to determine whether it is a refurbished machine.

How to identify refurbished iPhones:

1. The secret in the numbers

Click on Settings--General--About this machine and you will be able to see the machine There is all the information in the machine, and one setting in the machine is the serial number. This set of serial numbers is very important for the iPhone. The seemingly irregular combination of numbers actually reveals the birth date of the iPhone 4.

2. Digital reminder

In the dialing interface, press the digital serial number of "* # 0 6 #" in sequence. This set of numbers must be exactly the same as the numbers on the phone card slot. , can the true identity be verified.

3. The writing on the back cover

The trademark information marked on the back cover of the iPhone, but if you compare it carefully, you will find that it is different. The machine with Chinese characters represents it. It comes from mainland China, and the word "china" means it is licensed from Hong Kong.

4. Information in the screws

The only two screws on iPhone 4 need to be carefully observed. Some are cross-shaped and some are torx-shaped. Apple's early products used cross-head screws, which were easy to refurbish. Later products all used torx screws that were not easy to find. The torx screws are very new, polished and bright, without any scratches. These two screws can also be a breakthrough for you to identify a refurbished machine. If the machine you buy is said to be new, but it has cross screws, there must be something wrong inside. In addition, it is not difficult to see whether the screws have been touched and whether they are polished.