Dell XPS 15 9560 WiFi Problem

I just purchased a Dell XPS 15 9560 less than a week ago and the WiFi is causing some issues.

The speeds are good when I am right next to the router but if I move into the next room over (less than 3 meters away) the speed slows down dramatically (to about 0.5-3 mb/s). 

There are 2 older laptops in the house and both of them have good speeds from anywhere in the house. One of them is also a Dell although not an XPS model.

I have updated the drivers and BIOS and I have spoken with tech support on the phone but they were not able to resolve the issue either.

Could this be a faulty wireless card or antennas?