Instruct: Classify Amazon reviews into positive or negative sentiment
Query: unacceptable static

I decided to gamble on buying this phone, as I was uncertain if the other reviewers had followed the R.T.F.M. principle. Unfortunately, I have to agree with the bad reviews. The sound quality is atrocious. As an engineer, I find it difficult to understand why the Siemens engineers would release such a product without thorough testing. I also called technical support, tried the de-register / re-register, and several locations for the base unit, switched off appliances, all to no avail. In addition, the base unit emitted a humming noise which was unacceptable. Hence, I promptly returned my phone.The aesthetic design of the phone is very appealling, and unlike anything else on the market. I wish other manufacturers would take note and remove the clutter of buttons.