Set whether SMS in application service is turned on or off.

It is safer to set SMS in the application service, which can prevent others from stealing the number. SMS verification code is an effective verification code system by sending verification codes to mobile phones. Both large websites, especially shopping websites, have the verification code function of SMS, which can ensure the safety of shopping more accurately and safely and verify the correctness of users. Some authentication code providers provide SMS authentication code service. Each website sends a request to the provider's server through the interface, and the server sends random numbers or letters to the mobile phone, and the provider's server verifies the authentication code uniformly. The verification code of mobile phone is very important, but if our mobile phone verification code is intercepted by a third-party website, our funds will be very dangerous. In fact, you can set this function on your mobile phone to prevent third-party software from reading SMS verification code. The first step is to pick up the mobile phone and open the setting point to open the system application, the second step is to open the information function point to enter, and the third step is to open the verification code safety protection switch.