I've tried to connect my Globetrotter Icon 7.2 UMTS Modem (usb_modeswitch active) with Orange Switzerland using the Gnome Network Manager. The predefined value for APN (defined as «click») is wrong imho, if you try to connect with this value the ppd is unable to connect.
See:
root@flo2eeepc:/home/flo# tail /var/log/messages
Oct 31 13:41:10 flo2eeepc pppd[6193]: pppd 2.4.4 started by root, uid 0
Oct 31 13:41:10 flo2eeepc pppd[6193]: Using interface ppp0
Oct 31 13:41:10 flo2eeepc pppd[6193]: Connect: ppp0 <--> /dev/ttyUSB0
Oct 31 13:41:10 flo2eeepc pppd[6193]: CHAP authentication succeeded
Oct 31 13:41:10 flo2eeepc pppd[6193]: CHAP authentication succeeded
Oct 31 13:41:11 flo2eeepc kernel: [ 97.875123] PPP BSD Compression module registered
Oct 31 13:41:11 flo2eeepc kernel: [ 97.942893] PPP Deflate Compression module registered
Oct 31 13:41:12 flo2eeepc pppd[6193]: Modem hangup
Oct 31 13:41:12 flo2eeepc pppd[6193]: Connection terminated.
Oct 31 13:41:13 flo2eeepc pppd[6193]: Exit.
I searched the Internet and finally got it working when i use the value «mobileoffice3g». I suggest to change it to a working value in further releases.
http://