Windows 8 contains a driver for devices that use the NDIS 6.3 interface. The first Vodafone USB Sticks with NDIS 6.3 will be the K4305 and K4305-Z. For all other devices, it is necessary to install Vodafone Mobile Broadband 10 to get the driver. The new Vodafone App can then be used with these older devices.
Please check our full compatibility list on http://support.vodafone.com/windows8