Funeral directors' licenses (like all professional licenses) in Pennsylvania are issued by the "Commonwealth of Pennsylvania", not the "State of Pennsylvania".
At the end,, Harrison sends a photo of the truck's license plate to the border patrol. The scene changes to where the border patrol has stopped the truck and shows the rear plate of trailer. Trailers would have its own plate and would not match on the truck itself.
Cellphones - especially an old generation flip phone like the one Hardison is using - will not function as flawlessly as depicted that far underground.