Apple 13 SMS has an exclamation point on it.

There is an exclamation mark on the iPhone SMS icon because the message was not sent successfully. Sometimes short messages are not sent successfully because of poor signal. Just find a place with a good signal and send it again. You can also go to the phone settings and look for the SMS icon. After entering, turn off the "iMessage" button and then turn it back on. It should be no problem. Of course, from personal experience, restarting the phone is a common method. You can try!

In fact, these are some very simple skills, but students who are not used to them may not know much about some functions. Here are some ways to use them. For example, the system language of iPhone is English originally, and they want to set it to Chinese. But after the switch, open the App Store or the English version. In this case, many students don't know how to set it. It's actually quite simple. When we switch the system language of the iPhone to English, the area of the App Store will also change, but when we switch back to the Chinese version, the App Store cannot automatically switch back to the Chinese version, which will happen. As long as you log out of Apple ID and log in again, you will automatically switch back to Chinese.