Make sure that you typed the correct WiFi network SSID (network name) and password. The network SSID and password are case-sensitive and must be EXACTLY correct. You can tap the password eye icon to view your password before submitting.
Make sure your mobile device and Arlo device are not too far away from your WiFi router. We recommend placing your camera 10-15 feet (3-4.5 meters) away from your WiFi router during the setup process. When the camera is set up and connected, you can move the camera to any place within range of your WiFi router. For more information, visit How do I position my Arlo wire-free camera?.
Make sure that the camera LED is blinking blue while the camera is being discovered. (The Arlo Video Doorbell LED ring blinks white.) The camera LED can time out if it blinks longer than two minutes without successfully connecting to your WiFi network. If the camera times out, press the sync button again. Make sure that the LED blinks blue for the entirety of the connection process. For more information, visit What do the different LED behaviors on my Arlo camera mean?.