Description：
Main uses: Identify the integrity of the phone used by service centers. The user apply for accident insurance only after the purchase of the phone, the maintenance of in-warranty identification, etc., which can effectively prevent fraudulent insurance and other illegal acts.
From the Redmi Note 2 models, Xiaomi phones begin to laser on the motherboard of a FSN two-dimensional code (a motherboard a code, with uniqueness, not repeated), such as Figure 1 red box location.
SN in the phone hardware test >> software and hardware version information (such as picture 2 red box location), corresponding to the FSN QR code laser on the motherboard.
The relationship between FSN and IMEI can be queried in the XMS system (not available to unauthorized employees).
