LTE will not work in areas without cell service, if your cell phone doesn't work LTE on the Toughbook will not work either.
If you find your Toughbook is not connecting to the BCEHS network check to see that LTE is enabled
Click on the LTE icon to see if both the WiFi and LTE are highlighted blue, and Aircraft mode is turned off
If the WiFi box is blue press it to turn it off, only LTE should be selected