Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Constant Hum; Use in Field

This phone is excellent in every way except two:1: The Large Talk button will hang you up if you hold the phone with your shoulder.2: Beyond 20 ft. in my house, the phone conversation is accompanied by a constant hum (a B note, in fact) that rarely diminishes. The manual tells you not to put it near computers, etc, so I put it in a huge room with barely nothing in it, and the hum persisted. I called the free tech support line(nice feature), and, after about a 3 days of trying to get a real person, they proceeded to tell me the exact same thing: "Do not use this product near computers, in the kitchen, or furthermore, near ANYTHING moderately electrical in nature. Make sure that you live 20 miles away from a city, and use a portable gas generator to power your phone in a large, barren field." Of course, I'm paraphrasing a bit, but that's how I feel, and if I can, I'll return this phone promptly.