Please perform the following steps to update the device modem. Note, it is very important that you follow the instructions as described here:


  1. Navigate to the following directory on the device: /sdcard/Garmin/.System/ModemSW and delete all files there. (connect the device therefore with a micro-USB cable to your computer)
  2. Download the attached zip file, and unzip it.
  3. Copy the two files (006B274200.bin and model.txt) from your unzipped folder to the ModemSW directory on the fleet 790 device: /sdcard/Garmin/.System/ModemSW. 
  4. Power down the device and then remove the USB cable from the side. Power up the device.
  5. Modem update will start automatically once the unit is fully powered up and will last for several minutes. Please do NOT interrupt the “Updating modem firmware” process. 
  6. Wait for about 10 to 15 minutes after the modem firmware update is completed and reboot the unit.