Why did you buy the built-in Apple App and want me to verify it by SMS when paying?

SMS is to ensure that the Apple App you bought is safe. This is for security, to ensure the safety of all kinds of information in the mobile phone, and it also proves that it is its own operating system. SMS is to ensure that the Apple App you bought is safe. This is for security, to ensure the safety of all kinds of information in the mobile phone, and it also proves that it is its own operating system. SMS is to ensure that the Apple App you bought is safe. This is for security, to ensure the safety of all kinds of information in the mobile phone, and it also proves that it is its own operating system. SMS is to ensure that the Apple App you bought is safe. This is for security, to ensure the safety of all kinds of information in the mobile phone, and it also proves that it is its own operating system.