SMS was moved twice and blacklisted.

There are two situations when SMS is blacklisted: 1: mass spam messages. 2. The same ID card has more than three numbers, including the arrears of downtime, and the arrears will be cancelled. The solution of blacklist:

Take a copy of your ID card to the mobile hall for lifting the ban, and write a letter of guarantee to ensure that you will not send spam messages in the future. If you are detected to send spam messages again, the consequences will be at your own risk. Pay off the arrears of other mobile phones with the same ID card, and cancel your account if you don't use it. After completing this process, you can turn on the SMS function. ...