How does the mobile qq security center distinguish between true and false?

Apple phones downloaded through the APP store must be real;

Download Android phone through 9 1 assistant and app treasure must be true;

By serial number identification

PC-side viewing mode: open the website of QQ Security Center = "Secret Protection Tool =" QQ Security Center Mobile Edition, as shown in the following figure.

Mobile phone viewing mode: Open the mobile version of QQ Security Center = "I =" Settings = "About QQ Security Center =" Serial number.

Serial numbers with the same beginning and end are true, but the difference is false.