One trick to help you understand the meaning of iPhone serial numbers and quickly distinguish between good and bad machines

Friends who have used Apple phones know that the serial number represents the unique identity information of the machine, but do you really understand the serial number? Let's talk about it today~

Generally, you can view the relevant serial number through the outer packaging, or open the phone - Settings - General - About this device to view the serial number of this device. Taking the following serial number as an example, it is divided into five parts, representing the OEM factory, production line, year and week, identification code, and model memory color in sequence.

Many friends may think that this machine is an official turnover machine when they see the beginning of F, but in fact, the beginning of the serial number represents the origin of the equipment, not the model. The iPhone serial number consists of 12 digits, arranged in the format of 111234445555

The first three letters of the serial number are the production location code

F: Zhengzhou Foxconn

C: Shenzhen Foxconn

D: Chengdu Foxconn

G: Shanghai Heshuo

Friends, don't blindly purchase Apple series products such as iPhones or iPads. There is a large amount of "electronic waste" in the market, such as code changing machines, expansion machines, and black card sticking machines. These types of machines are not only prone to black screens, crashes, and inability to start, but also very difficult to repair. Many consumers think they are buying brand new machines, but in fact, they are buying back sealed machines or such "electronic waste".

For example, on this iPhone 13 ProMax, some data shows a "full green full score", but through the detective's GSX comprehensive test report, it was found that it was a "code change machine". Therefore, when purchasing Apple products such as iPhones or iPads, please remember to take a look at the detective's GSX comprehensive test report.

The fourth digit of the serial number represents the production year with 20 letters (26 letters do not include A, B, E, I, O, U), and is rounded every six months. The fifth digit of the serial number represents the production cycle with numbers 1 to 9 and 18 letters (26 letters do not include A, B, E, I, O, U, S, Z), starting from 1 and circulating every six months.

The sixth, seventh, and eighth digits of the serial number belong to Apple's internal identification code and have no external meaning. The last four digits in sequence represent the phone model, phone memory, and phone capacity. As for the purpose of the serial number, it is more about checking and verifying warranty.

Do friends have any knowledge points to share?