Looks like THIS ONE is what you are looking for.  Also here is a programing utility for the card
Hi all, I have a Verizon Mini Card built into my M1330 Laptop.  Have been having some problems and wanted to update the driver.  Went to the driver page and got confused.  There are driver, firmware and utility downloads listed.  Not sure which ones to get.  Obviously don't want to get the wrong one and really screw things up. Here is the info from the program From Device Properties Firmware - 141 Dell 5720 AZW Mobile EVDO Rev A E725 Verizon From About Version 2.06.02.14 Build 060 4/13/2007 Driver versopm 3.0.0.4 Which of the programs from updated driver and downloads should I use.  
Right update for Broadband card