1./ Open a terminal, become root.

2./ get the driver, either from:
wget
https://forge.betavine.net/frs/download.php/269/vodafone-mobile-connect-card-driver-for-linux-2.0.beta3-ALL-i386-installer.run

3./ run it:
vodafone-mobile-connect-card-driver-for-linux-2.0.beta3-ALL-i386-installer.run

And provide your the username that will be use to surf.

4./ [g/k]vim /etc/udev/rules.d/99-huawei-e220.rules
add this bottom line:
SUBSYSTEMS=="scsi", ATTRS{vendor}=="HUAWEI", OPTIONS+="ignore_device"

5./ Restart the PC or reload the udev rules manually :
udevcontrol reload_rules
OR (depending the distro's)
/etc/init.d/udev restart

6./ Change APN host to : internet.proximus.be

7./ Use static DNS (for more fun), as usual:
195.238.2.21 and 195.238.2.22

8./ Then to connect/surf, just invoke:
vodafone-mobile-connect-card-driver-for-linux
(hopefully, your PIN code will be required)