This service may be applied with the default dialer (see TelecomManager#getDefaultDialerPackage()) or possibly a third party app to allow or disallow incoming phone calls before they are demonstrated to a consumer. CameraPrewarmService Established The bottom context for this ContextWrapper. All calls will then be delegated to the base context. Throws https://www.youtube.com/watch?v=RSlwOZLlUGg