I have found the same issue. I bought the dell venue 8 and using skype was probably t the top of my reasons to do so.

I wonder if Dell will do anything to fix this or at least work with Skype to get it fixed.

I am very dissatisfied with the Dell Venue 8 because of this and will soon start posting reviews to that fact if this isn't addressed and fixed soon

We found a version of Skype that seems to work. See this post over in Google + and try out that version and let us know:

https://plus.google.com/107968447119653478287/posts/fuDQVjB3R2j

I tested with the Echo Call Testing Service. 

Didn't work for me.  There's a much larger problem with the sound / mic implementation on the Venue 8 android.  I can't get any programs like skype, xfinity connect, etc that employ 2 way communications to work.

Lovingit: Have you gotten the 4.3 OTA update, yet?

The latest Skype still did not work for me with that upgrade. Haven't tried those earlier versions mentioned above.

Thank you Clay for responding.  Yes I have 4.3.  I tried installing the Skype at the link you provided and it would freeze after starting it.  After that failed, I reinstalled the latest skype and it has issues with the sound as well.  Same problem with xfinity connect which is a wifi VOiP app.  I can place a call, but I can't hear anything.  People *sometimes" can hear me.  

Overall I was having issues with very low volumes with headphones, bluetooth, and of course Skype & xfinity.  I did a factory reset and reinstalled all the apps again.  The next time I tried to turrn up the volume I got a warning about damaging my hearing blah blah blah and once I accepted the warning, at least the bluetooth and headphones are loud enough.  This makes me wonder whether whatever volume "safety" program the lawyers made Dell install is messing up these other programs.

I have the same problem.

No MIC on Skype calls.

It works fine with Hangout.

Del 7840 android 5.

Any suggestions?