Instruct: Classify Amazon reviews into positive or negative sentiment
Query: No mute == almost worthless

My old GE cordless headset phone is on its last legs, so I went over to Best Buy to get this one as a replacement. I hooked it up, charged it up, stored my frequently-used numbers and was all ready to enjoy the phone. . . until I noticed that there's no mute button. I looked through the documentation then looked again, searched the web and called "customer service" (warning: if you want to talk to a live person, you will have to make a toll call). No luck: no mute feature.Who was the Einstein who designed this phone with no mute button? I'm a telecommuter who sits in conference calls for too many hours a week, and without a mute button this phone is useless to me. I'm taking it back immediately.