Huawei mobile phone U8520 can't send short messages. What happened?

According to the situation description, there are two situations:

First, the mobile phone has security software settings to intercept sending short messages. Find and modify such software, or try another mobile phone.

Second, the problem of mobile phone is eliminated, which means that the mobile phone sends too many short messages, which is judged by the system as spam messages and is turned off and sent. Call customer service or bring your mobile phone card to the business hall. After the demonstration, the customer service will contact the background data to find out and solve it.

Three. It may be caused by the wrong number set in "SMS Center" in SMS settings. You can first write down the number of the current SMS center on paper, and then refer to the number set by other people's mobile phones (such as GSM, WCDMA, TD, CDMA-2000), or search online and try to set it up. In general, there is no need to set up a short message center.