IMessage keeps showing waiting for activation. How to solve it?

1. Enter the interface of Apple mobile phone and click the settings icon.

2. Next, you need to select the information option, as shown in the figure.

3. Next, you need to turn on the switch behind the imessage information option.

4. Next, a small window will pop up and select the option.

5, the interface prompt is waiting for activation, just wait patiently.

6. After successful activation, a long text description will appear. At this time, you can use the imessage function.