Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Just not written for modern wireless services

This book simply does not cover the myriad options that come with wireless services today. The cover has a picture of a cell phone with an antenna on it. I don't think even home phones have antennas any more, but I wouldn't know first hand since I don't own a home phone. I desperately need a cell phone now and this book was not useful in making a decision easier.