But the availability of faster Comcast uploads has a catch—users can only get the higher upstream speeds by purchasing xFi Complete, which adds $25 to monthly broadband costs."xFi Complete includes an xFi gateway, advanced cybersecurity protection at home and on the go, tech auto-upgrades for a new gateway after three years, and wall-to-wall Wi-Fi coverage with an xFi Pod [Wi-Fi extender] included if recommended.But Comcast is only making the upload boost available to those who subscribe to the pricier xFi Complete service.While the standard monthly rate for xFi Complete is $25, new customers who sign up by December 31 can get it for $20 monthly during the first year of service.Comcast also said that giving the upload boost to xFi Complete customers first follows its "typical validate, test, and certification process for a new network innovation.""