... electronic messaging, including e-mail and instant text messag-ing. It has a small, but serviceable keyboard for entering messages. ✦ Most cell phones now support short messaging service (SMS) ... lot more informa-tion about adjusting your channels later in this chapter, but for now, remem-ber that having two access points on the same channel is a bad thing.Microwave ovens emit interference ... telephone network elsewhere in the book. You can find information about cellular-based packet data networks in Book VI, Chapter 1. In addition, some cel-lular carriers have launched so-called...