"Vodafone Mobile Connect Card driver for Linux is a tool that allows you to establish a connection to the Internet using 3G cards. It also allows to send and receive short messages from your computer. The cards currently supported are: Huawei E620, Huawei E220 and Option GlobeTrotter 3G+ EMEA.
"In order to use your 3G device, you should run a fairly recent version of the Linux kernel..."