Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A real piece of crap

Sound quality on this unit -incoming and outgoing messages - is awful. After about a month, the machine started freezing, not picking up calls etc. I called ATT customer sevice, they had no insight into the nature of the problem. They wanted me to send it in so they could examine it and replace it; I'm going to replace it, but it won't be with an ATT machine.