Apple 7plus automatically replies to text messages. I don't know the content of the information. What happened?

You should have turned on the automatic reply function of the ios system. The solution is as follows:

1. Open the settings button and gear button in the main interface of iPhone;

2. Find the green phone button and turn it on;

3. See the "reply message" button below to enter;

4. At this time, you can see the default reply information;

5. Click Edit to write the information, and then go back to use it.