The serial number of an Apple device is not just a string of irregular numbers, in fact, it also has a big role. Whether you buy a brand new phone or a second mobile phone, you can check the real information of the mobile phone through the serial number.
If you buy a brand new iPhone, you can check whether the phone is brand new and not activated by the serial number to avoid buying a post-seal. Because the first activation of the iiPhone is an irreversible process, the serial number will record the date of the first activation of the phone, if it is brand new and not activated, then the verification result will show "not activated, please activate first".
If you're buying a second-hand iPhone, the serial number will help you avoid many of the pitfalls of a second-hand iPhone. First of all, look at the type of sales of mobile phones, sales types are divided into retail machines, official replacement machines, resource machines, display machines, etc., be careful that merchants use inferior official replacement machines, resource machines, etc. to impersonate retail machine sales. Also pay attention to the original memory capacity of the iPhone to avoid sellers selling as large-capacity iPhones after expanding the size of the phone.
In addition, the pit that is easier to step on when buying a second-hand iPhone also has restrictions such as activation locks, configuration locks, network locks, etc., and we can also check whether the phone has these locks through the serial number.