Some of the 1st Fire District Battalion Chiefs were testing on Fire-Main and Fire-Englewood utilizing the cell phones from the DEX computers which are mounted inside the vehicles. The cell phones can be removed and have an app on them which allows access to the 800 trunking system. Battalion 1 caught my attention when he was testing from underground (I'm assuming CTA tunnels but can't confirm). I've heard other exempt ranks using the cell phones for awhile now, but this is the first time I've heard range testing from the battalion chiefs. No radio ID's are showing when they're using the cell phone instead of the portables too.
Portables are being reprogrammed so when a user presses the Home button, it will go to the FD 800 / EMS 800 Zone (Main or Englewood) now. It was programmed for the "old" 470 Mhz system.