"Activate iOS 16.4 feature for optimal performance."
iOS 16.4 has introduced Voice Isolation, a new feature that significantly reduces ambient noise during voice calls on compatible iPhone models. To enable it, users can select the Voice Isolation option in Microphone Mode during a call. This feature is currently available on iPhone 14, 13, 12, 11, XS, XS Max, XR, SE, and SE 2020 models.