Why is there an exclamation point in my text message?

There is an exclamation point, indicating that sending the short message failed and needs to be sent again. If it is not solved, the imessage function may not be enabled. The solution is as follows:

1. First, in the desktop interface, the information icon has an exclamation point, as shown in the figure.

2. Click the Settings icon on the desktop, as shown in the figure below.

3. Open the phone settings interface and click the information option, as shown in the figure below.

4. Open the information interface. In the imessage information bar, click the toggle button.

5. At this point, the imessage information bar is light green after it is successfully opened. However, if you exit the desktop, click Info, and then exit the desktop.