OK, I downloaded the script and ran it. Got this:
When I look at it in Network Manager,
Modem device: '/sys/devices/pci0000:00/0000:00:1a.7/usb1/1-3'
Data device: 'ttyACM0'
Version: L0290VWB522F.242 1 [May 12 2011 13:21:52]
1x State: registered (roaming unknown)
EVDO State: registered (roaming unknown)
Signal quality: 48
it looks like this (Note - I did check "enable mobile broadband):
When I look at the configuration for the wireless connection in Network Manager, it's set to
Type: Mobile Broadband
Connection State: not enabled
IP Address: no address
Connection Speed: unknown
System Name: ttyACM0
Signal Quality: 0%
Access Technology: unknown/unknown
Any other suggestions?