Comment 158 for bug 554099

Howto for Maverick, generic UMTS on Thinkpads:
Download and extract windows driver install file from Lenovo. http://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles/7xwc44ww.exe or get the latest from http://www-307.ibm.com/pc/support/site.wss/MIGR-72938.html
Install a recent wine as 1.2 crashes during msi extraction.
Run the install file with wine.
Extract firmware from GobiInstaller.msi. mkdir ~/.wine/drive_c/DRIVERS/GOBI; wine msiexec /a ~/.wine/drive_c/DRIVERS/WWANQL/Driver/GobiInstaller.msi /qb TARGETDIR=C:\\DRIVERS\\GOBI

install "gobi-loader"

Copy firmware into /lib/firmware/gobi. sudo mkdir /lib/firmware/gobi; cd ~/.wine/drive_c/DRIVERS/GOBI/Images/Lenovo; sudo cp 6/* /lib/firmware/gobi/; sudo cp UMTS/* /lib/firmware/gobi/

Do a reboot or modem-manger restart and qcserial unload load. sudo pkill modem-manager; sudo rmmod qcserial; sudo modprobe qcserial

You should now have a "New Mobile Broadband (GSM) connection..." in the nm-applet. If not, do the thing in the previous paragraph or have a look at syslog