Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor Voice Quality

I have owned a few of these phones over the years and they have all had great voice clarity. Not so with this one; AT&T changed the design so that the high frequency content is filtered out. It's all part of a greater conspiracy which began with cell phones to use as little network bandwidth as possible. Why waste precious network bandwidth on plain old voice when they can charge so much more sending data. The high frequency content which allows you to hear the letters "f" and "s" is virtually gone on this phone. I guess they figure that people are so used to the limited bandwidth on cell phones that they would never miss it on this plain old telephone. Not me; I would have returned the phone if I had purchased it at a local store instead of Amazon.