Instruct: Classify Amazon reviews into positive or negative sentiment
Query: TCX905 & TRU9485 disappoint

These units are a major disappointment. The handsets frequently went dead, and when they did work there was static. Uniden technical service told me it was because my house is too big and because I have a wireless router for our computers. In addition, I found their website technical help not too helpful. Although the wait on their telephone technical service is long, at least they tried to be helpful, although ultimately they were not much good as I still have a base set and eight other handsets that drive us crazy with static and/or dead phones.