You are considering whether to buy a product. You look at the reviews. Would the following review decrease or increase the chances of you buying the product?
Review title: Rapid deterioration
Product review: When I first got this phone, I thought it was great. However, over three months of use, the sound quality gradually deteriorated so that now, it is becoming difficult to hear the person on the other end over a loud background hum. I have removed numerous potential sources of interference, such as electronic equipment, to no avail, and other phones on the same line do not experience the problem, so I can only conclude that the fault lies with this phone.
