The Xiaomi Redmi Note 6 Pro Android device with a build fingerprint of xiaomi/tulip/tulip:8.1.0/OPM1.171019.011/V10.2.2.0.OEKMIXM:user/release-keys contains a pre-installed app with a package name of com.qualcomm.qti.callenhancement app (versionCode=27, versionName=8.1.0) that allows other pre-installed apps to perform microphone audio recording via an accessible app component. This capability can be accessed by any pre-installed app on the device which can obtain signatureOrSystem permissions that are required by other other pre-installed apps that export their capabilities to other pre-installed app. This app allows a third-party app to use its open interface to record telephone calls to external storage.