Technically it is a modem, USB and (due to the CDFS format) virtual CD-ROM device. Launched on 21 June 2006, the device is used for wireless Internet access using 3.5G, 3G, or 2G mobile telephony networks. It supports UMTS (including HSDPA), EDGE, GPRS and GSM. E220 works well with Linux, as support for it was added in Linux kernel 2.6.20, but there are workarounds for distributions with older kernels (eg for Debian etch's 2.6.18). The card is also supported by Vodafone Mobile Connect Card driver for Linux, and it is possible to monitor the signal strength through other Linux applications. Most 3G network