Why can't Unicom 22 card bind the free stream to receive short messages?

1. If you can't receive SMS verification code on your mobile phone, there may be the following reasons: 1 Your number is currently in an abnormal opening state such as downtime and loss reporting. I suggest you open the number and try again; 2 Your mobile phone has put the short message into the trash can, or the mobile phone security software has intercepted the short message, you can look in the short message trash can first or the software has intercepted it; Due to the large number of users, the speed of sending short messages is slow. You can try again later. Your mobile phone receives short messages abnormally. I suggest you change your mobile phone for testing. 2. If this is not the case, it is suggested that you can contact Unicom's manual customer service to verify the handling, depending on the actual situation.