How do I get unlimited tethering on my LG k10?

I have a LG k10 on metro with the unlimited data plan and was wondering if someone could walk me through the steps on how to get unlimited tethering, specifically for an xbox. I am a layman whenever it comes to all this so if you could give me babysteps that would be great. I have tried looking it up but i cant understand what
is going on half the time lol. I would rather not root if i dont have to but if i do thats ok. Thanks in advance for any help.