It Appears During Phone Idle Time
If your phone is sitting on a table and the indicator suddenly appears with no obvious reason, check which app is active.Android OS
In most cases, there is an innocent explanation, but it’s always good to verify.
How to See Which App Is Using the Camera or Microphone
Most recent Android versions allow you to identify the app responsible.
Generally, you can:
Swipe down from the top of the screen to open Quick Settings.
Tap the privacy indicator (if available on your device).