Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worked properly for 3 months

I was very satisfied with this watch for about 3 months. But very soon the watch stopped to be radio controlled. I live in Boulder, Colorado which is very close to Fort Collins, from which the radio signal broadcasts. My attempt to perform manual receive also had no success, because the button A does not work. I tried to call customer service, but couldn't obtain any answer to my questions: they asked to hold and after few minutes of waiting disconnected.