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

I would not recommend this phone. It has plenty of bells and whistles, but suffers from poor reliability and design. The operating system frequently locks up, leading to missed calls. The ring buttons on the exterior of the phone are easily jostled and often change the ring style without the owner being aware of the change. Lately the phone has simply stopped ringing altogether when an incoming call is detected. The event lights work and the caller is identified, but no ring sounds. I have contacted TMobile and will be getting a replacement phone, however my research indicates these problems are widespread within the V600 model. Motorola would have done better to eliminate some of the bells and whistles and instead make certain the phone functions to make & receive calls.