Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Nice "Human design" and features, BUT speakerphone problems

First let me say that the speakerphone produces plenty of volume, much better than most other phones I have tried. This was especially important since I often participate on nightly conference calls overseas where low receive level is often a problem.However, there is one major problem that might be related to poor design or manufacturing variation. (I have 3 of these phones). If another person picks up an extension in another part of the house while using the 972 speakerphone, the 972 speaker will cut in and out often introducing an annoying clicking sound for all parties listening. The amount of muting and clicking is differs significantly between the 3 phones I own. In the worst case, the speakerphone is totally muted and I can't hear anything.