What does a red dot in the upper right hand corner of my I phone 12 pro mean
What does the red dot in the upper right hand corner of my iPhone 12 Pro mean
iPhone 12 Pro, iOS 15
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About the orange and green indicators in your iPhone status bar
With iOS 14, an orange dot, an orange square, or a green dot indicates when the microphone or camera is being used by an app.
An orange indicator 
means the microphone
is being used by an app on your iPhone.
This indicator appears as an orange square if the Differentiate Without Color setting is on.
Go to Settings > Accessibility > Display & Text Size.
A green indicator 
means either the camera or the camera and the microphone are being used by an app on your iPhone.
This is an awareness feature. The user can get the status of their camera and microphone at a glance.
Axel F.