Hello, I've eventually received a Raspberry Pi. I've successfully installed SAKIS3G and got access to Internet using a Huawei E1692 Internet Key. External USB hub is not necessary for the Internet key to work, but if any USB dongle is inserted in the PI when already powered, the Pi restarts. Any USB device has to be attached before powering the PI. Everything is OK if an external USB hub is used to provide additional power. Bye!