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We normally advise to have your box connected with a wired connection. If this is not a possibility don't worry its just something we recommend for the best connection.
To connect your TiVo to wifi :
ON your remote press the MENU button >Scroll to the settings icon, then navigate up until you see home network settings.> Click the OK button > Choose to set up your home network > Then select join network.
If you are still having issues with this or if you would like to set up your box with a wired connection let us know and we can certainly help you with this.