When Apple released iOS 16.4 it March, it brought a host of new features to your iPhone. Among the new features, such as new emoji and Apple Music updates, Apple brought Voice Isolation, a handy FaceTime feature, to regular phone calls. Apple rolled out Voice Isolation and Wide Spectrum to FaceTime calls with the release of iOS 15 in 2021, but only Voice Isolation is available for phone calls, too. 
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