Red dot above signal upper right corner dialing a call
When I try to call a certain person on my iPhone 11, a red dot appears above the signal bar in the upper right corner but it doesn’t ring and then goes to voicemail
iPhone 11, iOS 16
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The red or orange dot means the phone’s microphone is on, which is actually necessary if you expect the person you are calling to hear you. See→About the orange and green indicators in your iPhone status bar - Apple Support
It’s normally orange, but will appear red to provide contrast to the background color.