For troubleshooting the above-given wi-fi connection issues on a Garmin 620 see to it if your router is set to a supported channel after that get the encryption disabled temporarily after that se to it that your router is broadcasting one of the supported protocols after that get the SSID entered manually in the router. The user should be careful while entering the SSID as it should be entered accurately for more info: Garmin Customer Support & http://www.garmincustomerservice.co.uk/