Mobile phone short message shows network failure.

There are two situations in which a mobile phone sends a short message to show a network failure:

1. The mobile phone has security software to intercept and send short messages, find and modify such software, or change the mobile phone to do experiments;

2. Troubleshooting mobile phone problems means that your mobile phone sends too many short messages, which is judged by the system as spam messages, and the sending is turned off. 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.