Moto X Pure Edition MetroPCS tethering
http://forum.xda-developers.com/moto-x-style/general/moto-x-pure-mvno-carrier-ting-vs-t3218182

One irritation with Ting was that tethering only worked on 3g. Which required manually setting the phone to 3g, after enabling the hotspot. You 

MetroPCS in contrast does not allow tethering unless you purchase a metro branded phone.

I was able to work around the metro pcs tethering restriction by adding a "tether_dun_required=0" entry to the sqlite provider.settings file, and now it works perfect on LTE with the stock hotspot software.