Generally speaking, signing is to write your mobile phone serial number into the software to be installed, that is, one-to-one correspondence. A the software signed by mobile phone users cannot be used by other users, and there will be a certificate error prompt.

Specifically, because of the security settings of S60 third system, programs that are started randomly or some programs that have cracked Chinese must pass the official authentication. However, not every developer has the ability to pass the official certification. Most certified software is a protected segment UID. All localization and cracking of the protection segment UID also depend on certificates in a large number of programs.

Why do you want to sign?

Signature can make the software successfully pass the data information verification of mobile phone, that is, certificate verification;

Signing can prevent virus files;

Signature can make some software start with the start of the mobile phone, without opening the program every time it is turned on;

Signature can crack some software (because the original official certificate was destroyed in the process of localization or cracking)