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# What to do if the device cannot connect to the network or find Wi-Fi

1. Supported network

Wi-Fi support depends on the model. B200/B210/B211/B310/B311/D110 use 2.4GHz only. T110/T120, SB400, SD200/SD400 and WD400 support 2.4GHz and 5GHz. Check the exact model and suffix for other devices. Enterprise-authentication and captive-portal networks are not supported.

Phone preparation

During Wi-Fi setup, connect the phone to the intended home Wi-Fi on a band supported by the camera. Temporarily turn off the phone's VPN, mobile data, automatic switching to mobile data and dual-Wi-Fi features where present. Keep one Wi-Fi connection active and keep the setup app open. Restore normal phone network settings after setup succeeds.

Router and signal checks

Check the Wi-Fi name and password, including case, and confirm that the router has Internet access. A network name alone does not prove its frequency band. Test close to the main router, away from walls and metal obstructions. Router client limits, MAC allow/block lists, isolated guest networks and insufficient upload bandwidth can affect setup or connectivity. Use the router's documented settings; do not broadly disable its firewall or reset all phone network settings as a default step.

For a 2.4GHz compatibility test, a separate 2.4GHz network name can make selection easier. Channel, width and security settings must suit the router, camera and local region; no single channel range applies to every device and region.

4G exception

BF200 uses 4G and Noorio Plus, not Wi-Fi. A BF200 that was already added and later goes offline must not be removed as a troubleshooting step. Check data-plan status, power and 4G signal. Removing it without an active data plan may prevent it from being added again. A clear QR-code label photo is needed for further device checks.