Instruct: Classify a given Amazon review as either positive or negative.
Query: Sound quality ruins nice phone

The sound quality of the Siemens phone is abysmal. It has an absurdly high talkback level (in other words, you can hear yourself as you talk; a loud annoying echo of your own voice, which is not only distracting, it prevents you from hearing the other person unless you are absolutely silent). The entire phone also picks up sounds, such as your sleeve rubbing against the back of the phone.From the other party's point of view, the sound is passable, although nowhere near as good as an average digital cell phone.The user interface is also flawed in many ways. For instance, if the handset is on the base unit, and rings, and you pick it up and press `talk', that actually hangs up the phone! The manual is also incomplete; it doesn't cover several items that are on the phone setup menus.One star for a beautiful look; zero stars for functionality. I returned the phone due to the terrible sound quality after one day, and bought the Panasonic instead.