Apple's SMS is pulled to the right. What is yellow?

After the upgrade of IOS 14, many friends found that yellow or green dots sometimes appeared in the upper right corner of the mobile phone. Many people think this is a BUG, but it is actually designed to protect personal privacy and security. The following is a detailed introduction.

Turn on the recording, the voice from WeChat. A yellow dot will appear when answering the phone, indicating that the phone is calling the microphone at this time. Turn on the camera of the mobile phone and a little green dot will appear.

It will appear during a video call, indicating that a small green dot will appear when the phone calls the camera.