Ac790s

I already had aircard watcher on one of my computers but it wont find device. So i tried your link and downloaded again and installed on my laptop by got the same problem, unable to find device. I have a vodafone sim in the aircard 790s and it reluctanly sort of works but only on international roaming. It will not work on normal data downloads. I have never been able to enter the mep code that telstra gave me though. They seem really unhelpful on this matter wven though i have been with them for 10 years and paid about 14000 dollars for a poor internet connection in that time. Then i have also had to buy two hotspots outright from them in that time also because of a sim card problem. The telstra firmware is stopping the vodafone sim connection from working unless its in a international roaming which costs more. Is there a generic firmware or some hidden setting i can change to allow the ac790s to work with other isps in the normal data mode.
Thankyou kindly for your help.
Warren