Was just monitoring a few moments ago and heard what sounded like the Dispatcher doing his best to get a driver or whoever to switch their secondary radio to Ch 1, then their primary to Ch 1 also. I haven't heard traffic just yet that indicates it's a cab company (monitoring Desert Cab on their 855.4125 assignment doesn't show any cross-traffic) so... guess I'll just keep listening.
But if it's them (Desert Cab), they're certainly not licensed for it from what I can tell...