When you hook the MiFI to a desktop to use as a modem, does it still act as a hot spot on other devices?
Alos does you old Modem and the MiFi have the same number, so you could use the old unit as a backup ?
I'm pretty sure when you got the MIFI, when it was activated that automatically deactivated your old modem. I could be wrong though.
No, when your MIFI is connected using the USB cable, it is no longer a "hot spot"... However, there is a way to configure it to do this - you'll have to search the forums for the instructions.