I've contacted T-Mobile support a couple times on the phone about this issue, but haven't been able to really get it resolved. Sometimes when I connect my computer to my hotspot device I am able to use a VPN to connect to my work intranet sites and network folders, sometimes I am not. When it work it works great, and I'm not able to determine any different settings on my device. When it doesn't work, I'm not able to ping any of the IP addresses I need access to, and when I access an intranet site it redirects me to http://lookup.t-mobile.com and searches for the intranet address that I've entered. I've found a couple related threads in the community, but nothing that seems to have answered my problem. If anyone has any ideas they are much appreciated.