The orange dot on an iPhone is a security feature introduced by Apple in iOS 14 or later versions. It appears in the top right corner of the screen, above the service, Wi-Fi/LTE, and battery indicators, and indicates that an app on the iPhone is using the microphone. The orange dot appears as an orange square if the Differentiate Without Color setting is on. This feature can be enabled by going to Settings > Accessibility > Display & Text Size. The orange dot can be helpful in monitoring which apps are actively using the microphone, such as when using the Voice Memos app, making calls, or using the dictate text feature to jot something down using your voice.