Why is there a text message below when Apple calls?

1. This is a bug in Apple's mobile phone. First enter the phone settings interface.

2. Locate General and click Open.

3. Find the "auxiliary function" in GM.

4. Find the "switch control" option in the auxiliary function and turn off the "switch control".

5. If you still can't remove the small box after closing, you can restart the phone.

6. When you finally make a phone call, the message bar below disappears.