I tried three different VT 1421's, and all of them had defective headset jacks. The audio quality was OK, but since the included headset wouldn't work, it was pointless to keep the phone. I would recommend sticking to an older vTech 900 mHz digital phone like the 1930, which has worked fine for me so far for over a year. If the Quality of these phones were only better, the small size and decent clarity would have made it a keeper. Oh well.