If you're seeing the iRobot Unable To Connect error, it’s likely due to a weak WiFi signal, incorrect credentials, or compatibility issues. iRobot vacuums require a 2.4GHz network and a strong signal to connect properly. Start by ensuring your phone is on the same network, and enter the correct WiFi password during setup. Restart your router and Roomba, and check for firmware updates ... https://roombasmarti.com/setting-up-your-roomba-with-a-mobile-hotspot/