How to cancel the exclamation mark on Apple's message?

Apple's message has an exclamation point, which is caused by the failure to send the message. Open Apple phone settings, click Info, turn off the switch on the right side of iMessage, and then restart the phone.

iPhone 13

IOS 15. 1

Setting 2.0

1. In the desktop interface, the information icon has an exclamation point, as shown.

2. Click the Settings icon on the desktop.

3. Open the phone settings interface and click the information option.

4. Open the information interface and click the switch button in the imessage information bar.

5. At this time, the imessage information bar is light green after being successfully opened.

6. But when you quit the desktop, you can see that the exclamation mark on the SMS of Apple's mobile phone has been removed.