The smart phone is used as webcam device. We can use it by installing IP Webcam app. Make sure that the Laptop and your smart phone must me connected to the same network using Wifi. A specific solution for Android: Install the free IP Webcam app. (Make sure you read the corresponding permissions and understand any security issues therein) Open the app, set the desired resolution (will impact the speed!) Scroll to the bottom and tap on 'Start Server'