What should I do if Unicom's mobile phone number registration fails to send WeChat SMS?

Unable to send SMS, the following situations may occur: 1. It is necessary to determine whether it cannot be sent to all users. If it is, it will react with the customer service staff. If an individual user can't send a short message, it may be caused by abnormal circumstances such as the other party's phone bill or account cancellation. 2. The local network signal is unstable, so it is recommended to restart the mobile phone attention. If it still doesn't work, contact local customer service. 3. No matter whether the object of sending short messages is ordinary users or help desk codes. If you use the help desk code, it is recommended to contact the help desk. Or try someone else's cell phone. If the mobile phone still doesn't work, it's the other party's information desk. If the mobile phone works, it is recommended to contact the customer service staff in this province.