XPS 12 Wireless is Faulty

I'm not sure why Dell continues to sell this product in its current state.  I just received a replacement that was supposed to correct the problems with wireless connectivity I was experiencing with the original XPS 12 I received several weeks ago.  The replacement has the exact same symptoms as the original.  As expected, Dell Support tried to suggest the problem was with my network.  The network operates flawlessly with an iMac, 2 Sonys, 2 iPhones, an Android tablet, Apple TV and several other wired clients.  I expected this product to work fresh out of the box.  What a disappointment.