How to find the production date of Apple mobile phone?

1. You can check the production date through the serial number of Apple's mobile phone. First, you must know the serial number, and turn on the settings of the mobile phone-general-for this machine, you can check the serial number of 12, and be careful that it is not IMEI. 2. Starting from the iphone4S, Apple adopted a new serial number, 12 digits, and adopted formats such as PPP y W SSSSCCCC, including production information and identification information. (1)PPP: manufacturer (2)Y: year of production (where the code for the second half of 20 12 is J)(3)W: production week (w is a number (1-9, excluding 0) and letters (excluding a, b, e and 26 letters). (4)SSS: machine unique identification code (5)CCCC: The following is the comparison table of production week in the second half of 20 12. If the serial number is C39JD****** * * *, J is the second half week of 20 12, D is 1 1 week, and 1 1 week in the second half week of 20 12 is the 33rd week of the year.