Install a webcam app on your phone and computer
Connect your phone and computer with USB or the same Wi-Fi network
Enable camera permissions on your phone
Open the app on both devices
Select your phone camera as the webcam source in the app
Choose the phone camera in your video call or streaming app settings
Position your phone on a stable stand or tripod
Keep the phone charged or connected to power
Use the rear camera for better video quality
Adjust focus, lighting, and angle before starting the call