How to check the origin and factory date of iphone7? How to check the origin of iphone7?

The first letter C of the iPhone serial number starts with Shenzhen, D stands for Chengdu and F stands for Zhengzhou. ? The fourth digit of serial number represents the year of production, and the fifth digit of serial number is represented by numbers and letters. *** 27 digits represent the week number, starting from 1, all words and letters are counted, and the cycle is once every six months.

The fourth digit of the serial number represents the year of production, which is represented by 20 letters (excluding A, B, E, I, O and U in the 26 letters). Note that it is rounded up every six months. Where m stands for the first half of 20 14, n stands for the second half of 20 14, p stands for the first half of 20 15, q stands for the second half of 20 15, and so on.

The fifth digit of the serial number uses numbers (i.e. 1 to 9, excluding 0) and letters (excluding A, B, E, I, O, U, S, Z in 26 letters), *** 27, which represents the day of the week. All words and letters are counted from 1 once every six months. For example, serial numbers N 1 and N9 represent the output of 20 14 in the first and ninth weeks of the second half of the year, respectively. It should be noted that 1 to 9 respectively represent 1 to 9 weeks, followed by c, representing 10 weeks, and so on.

For example:

The serial number of this iPhone 6 starts with D, representing the origin of Chengdu, and the fourth serial number is N, representing the delivery in the second half of 20 14, and J represents the fifteenth week, so this machine was made in Chengdu in the fifteenth week of the second half of 20 14. More precisely, it was delivered in the middle of June 20 14.

PS: PS: It takes some time for the iPhone to arrive at the end user, so the difference between the factory date and the first activation time is generally about one month, which is normal.