Question:

After upgrading the device to the latest version or Android S OS(One UI 4), a green dot appears in the upper right corner of the screen while using an application. What is this?  

Answer:

The green dot appearing in the upper right corner of the screen after updating to Android S OS (One UI 4) indicates that an app is currently accessing either the camera or microphone on your device. This feature is part of Android 12's enhanced privacy measures, providing users with real-time transparency regarding app access to sensitive hardware. To manage this, open the Quick panel, locate the relevant icon, and review which apps are actively using the camera or microphone. You can also use the Quick panel to temporarily restrict access or visit the Permission Manager within Settings to adjust permissions more permanently.