iOS 16.4 improves iPhone call quality with Voice Isolation

Apple will release iOS 18.4 in April, which may include new emojis and a Food section in Apple News. Meanwhile, iOS 16.4 introduced Voice Isolation for regular phone calls, improving sound quality by reducing background noise. To use Voice Isolation, activate it during a call through the Control Center. This feature will stay on for future calls unless turned off. Wide Spectrum, which amplifies background sounds, is currently only available for FaceTime calls. Voice Isolation helps users focus on conversations without distractions. The availability of Wide Spectrum for regular calls may change in future updates.