I admit to knowing nothing about this manufacturer. Are they an OEM? Is it possible to establish a chain of trust for the boot process? Is the 4G LTE modem sa

I admit to knowing nothing about this manufacturer. Are they an OEM? Is it possible to establish a chain of trust for the boot process? Is the 4G LTE modem sanboxed away from the OS? What are the chances of this working on US carrier's networks?