I am a USER who has a Nexus 5 impacted :
Be carreful if you want to buy a NEXUS 5 because of this annoying bug afecting LG-D821 LG-D820 :
Overheating in some circomstances. So the phone is ALMOST unusable. Or not easily usable.
FOR ME, I can't only use my Nexus 5 as a hotspot without overheating.
It's seems to be topical yet with 16.04 Xenial.
I can't tell you what are the nexus 5 without this problem.