The K3565-Z is sold with Vodafone Websessions currently for 30 EUR (in Germany). There is no hardware-based Simlock, only the connector-software by Vodafone won't work with other networks, but this software sucks anyway. The problem seems to be to find...

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)...