Why does Apple's mobile phone information have an exclamation point?

Take the iPhone 12 mobile phone IOS 14.3 system as an example. There is an exclamation mark on the information icon of Apple's mobile phone. At first, it may be caused by the user not sending text messages. If it is caused by the failure to send information, the user only needs to find the information that failed to send, click resend, and an exclamation point will be sent after success.

Secondly, it may be that the imessage function of the user's mobile phone is not turned on. If the user does not turn on the phone, the user only needs to turn on the phone, find the setting option from the phone desktop and turn it on.

After entering the mobile phone system settings page, slide down, find the information option and open it. When you open it, you can see the imessage option. Click the switch behind the option to open, and the problem will be solved after opening the two systems.

Skills of using Apple's mobile phone: Take Apple 1 1 as an example. When using a mobile phone, if the user wants to turn on the power-saving mode of the mobile phone, he only needs to turn on the battery option on the phone system setting page, and then click the switch behind the low battery mode option.

If the user wants to check the battery percentage of the mobile phone, he only needs to open the mobile phone, hold down the small ear on the right side of the bangs of the mobile phone and pull it down, and then enter the control center page to see the battery percentage of the mobile phone, which is also convenient.