Xfinity is a brand name used by Comcast Corporation to market its cable television, internet, telephone, wireless and home security services. Xfinity claims to offer the best connectivity and entertainment experience with its 10G network, mobile service, home security system and streaming platforms.

Xfinity mobile service cost depends on whether you choose a by-the-gig or an unlimited data plan. By-the-gig plans start at $15/month for 1GB of shared data, while unlimited plans start at $45/month for one line of data. You can also mix and match different data options for each line on your account