US cable giant Comcast has launched new mobile telecoms operator Xfinity Mobile as it seeks to retain customers who have been switching to rivals’ “quad-play” services. Verizon’s partnership with Comcast in providing the infrastructure for Xfinity could be threatened if… US cable giant Comcast (NASDAQ:CMCSA) has launched new mobile telecoms operator Xfinity Mobile as it seeks to retain customers who have been switching to rivals’ […]