Why is there a chat record on my classmate's mobile phone iphone?

First, open the settings in and find the information. At this time, we can see such a picture. Click the button at the back. Note: Some friends may already have an APPLE ID, while others don't. Let me introduce the situation of having an ID card first. Friends who don't have an APPLE ID can jump directly to the following ~ ~ ~ directly enter your ID password, and click here to log in. It is necessary to say that the first line is the second line and the third line is optional. Tick the box to fill in information is very simple. Please be careful not to forget when you choose the area to fill in. Oh, this is the account you will use in the future, and it is also used in many other places ~ For example, if you don't select the option in the second line of downloading the APP, a question will pop up here. What if I don't verify it? It is easier to make a small suggestion and verify it directly with a computer. There will be emails in it.