I just did it. So far so good. Less than $20 on Amazon.
https://www.amazon.com/gp/product/B00STV5UKW/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
I suggest spending $30 (on Amazon) to replace the crappy Broadcom with a Linux kernel supported version. This is a very simple process and you'll never have to worry with Broadcom again.
Here's a how to link from ifixit...
https://wiki.archlinux.org/index.php/Dell_XPS_13_(2015)
This card will work fine - Intel 7265.
Upgrade your wireless card, it's cheap.
IntelĀ® Dual Band Wireless-AC 7265 2x2 + Bluetooth 4.0 http://www.amazon.com/Authentic-7265NGW-Wireless-AC-802-11ac-Bluetooth/dp/B00STV5UKW