Any call from WIL comes up (937) 000-0000.....This sounds more like another rumor than reality. What would corporate say? "I called the driver's personal cell phone (that we don't reimburse him for) and he answered it, so we terminated him" That makes about as much sense as dancing in a minefield. If anyone tries to discipline you for answering your phone, all you have to do is produce your call log with the 700 entries where they were hunting you down to make a "hot" pickup. Do yourselves a favor and buy a bluetooth headset. Unless the policy has been recently changed, drivers were instructed to terminate the call, pull to the side of the road when safe to do so, and then return the call.
Now, if you are cruising down the highway holding your phone to your ear and are observed doing so, that is a whole other matter.