^^^ Yes, please. I know pfsense, but haven't used it. Are you hard wired from the phone (microUSB) to a computer (or embedded device) (with standard USB) running pfsense? Dang; wish I'd read this a week ago. I was looking to fabricate some kind of 4G-to-router connection as an alternative to re-upping my AT&T Uverse Internet...
Maybe take the tech discussion to the appropriate networking/routing forum and give us a pointer to a write-up there?