A modem and router work in tandem to deliver you an internet connection and then grant access to your various devices.

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Jim Rossman / TNS This week, a reader writes, "I’ve had AT&T internet service for quite some time and still have the original router and modem. Should I upgrade for security and performance reasons?

AT&T may be working to improve its cellular network reception by building a femtocell, an in-home cell base station, directly into its fiber-optic U-Verse service's modem. U-Verse is AT&T's ...