The short message can't be opened, but it keeps showing that it is loading, the Internet service is unavailable, and other functions are normal. What happened?

The display screen should show the network service information being loaded. If it can't be opened, the phone is out of memory, or the service information with the URL. You don't have a network service access point. It is recommended to go to phone settings > connection settings > access point settings and select a network access point. After setting, shut down and restart.