How do I install and connect my Honeywell T6 Pro thermostat to WiFi?

To connect your T6 Pro to WiFi, first ensure your smartphone is connected to a 2.4 GHz WiFi signal, then download the Resideo App from the App Store or Google Play. Open the app, log in (or create an account if needed), tap Add Device and follow the prompts to complete the setup. The thermostat requires a 2.4 GHz network rather than 5.0 GHz, and many routers broadcast both frequencies.