What is the exclamation mark on the SMS icon of Apple's mobile phone?

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

In fact, these are some simple skills to use, 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 was originally English, and I wanted to set it to Chinese, but after switching, I opened the App Store in English. 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.

I think many students often have typos when sending WeChat and QQ. IPhone has the function of shaking to undo misspelled words, which can be said to be very practical. Just go into the settings, find the auxiliary function in the general settings, and turn on the shake cancellation here, which is simply inconvenient for a disabled party like me.

Many students may not have tried it. There is a function of dragging the cursor at will in iPhone. As long as you press any letter in the keypad or the space bar, you can drag the cursor at will, so as to accurately locate the cursor position, which is very practical when modifying the text. There is also a function that can quickly switch input methods at will. As long as you press the earth icon on the keypad, you can quickly switch input methods or enter the keyboard setting interface. These tips are really interesting, so try them!