I could find a way to make NM work on Intrepid with my f$*g Sierra card:
* boot windows and use the Sierra tools to "deactivate PIN security" (set the card not to ask the PIN code at each usage)
* re-boot intrepid and set nothing in the PIN field of my broadband card setting
* launch NM broadband connection - OK
Sure it's not perfect, but helped me use this 3G card...
I could find a way to make NM work on Intrepid with my f$*g Sierra card:
* boot windows and use the Sierra tools to "deactivate PIN security" (set the card not to ask the PIN code at each usage)
* re-boot intrepid and set nothing in the PIN field of my broadband card setting
* launch NM broadband connection - OK
Sure it's not perfect, but helped me use this 3G card...