I had an Inspiron 5160 that had numerous problems. One problem was the external microphone I bought did not work for voice playback and more specifically Microsoft Dialer. I called Dell Tech Support as the computer was still under warranty, and performed numerous diagnostics, etc. The microphone was not defective as it worked with the voice recorder and passed all the hardware tests. I did not want to record my voice, I wanted the ability to make phone calls, specifically for when I was on hold or long phone calls (as with Dell Tech Support). I was unable to access any kind of microphone or line volume contols through the control panel, nor was able to add the microphone volume controls for the playback through the properties option on the volume control panel. I contacted Sigma Tel Audio who manufactures the driver and they said all they were responsible for was the design, and to contact the computer manufacturer. After surviving 12 documented hours spanning 25 seperate phone calls, 6 seperate supervisors failing to return promised follow-up calls (for this issue and many others), reformatting my harddrive and reinstalling windows twice (for seperate issues), I finally convinced Dell my computer had a problem and they agreed to send me an upgraded new computer for my troubles. My replacement computer was the XPS M1710, which needless to say blows my Inspiron out of the water. I still am unable to plug an external microphone into the jack and use it for voice play back and Microsoft Dialer. I called Dell Tech Support again today and after spending over an hour doing the same diagnostics, etc, the support agent came back after placing me on hold for 10 minutes and said that she just found out that Dell Laptops are unable to perform voice playback functions, is this true? I don't understand how I can talk to at least 10 seperate people, many of them supervisors, about this specific microphone issue and no one could know that microphones dont work with Dell laptops. I even called a Dell outlet during this long ordeal to see that if I acted like a new customer and asked him if I was buying a new laptop and wanted to plug a mic in and use it for voice playback if it would work, and they said yes. Am I being bs-ed by the tech support? If this is true, why dont Dell Laptops perform this function? Please help.