The Vodafone 845 is using the same ZeroCD crap as other UMTS hardware by Huawei. For Linux (or libusb), usb_modeswitch exists, but this did not work for me. So here is how to toggle the device itself without any special...

The Huawei E1552 (and other) UMTS USB-stick provides a ZeroCD called flashdrive, which provides drivers and utilities. To disable it (and prevent it to be mounted all the time), you can use the following AT-command: at^u2diag=0 (Source: Huawei forums)...