Can I use AirPort Express without an Ethernet cable?

[apotheke]

I live in a district where phone lines don't reach, therefore I don't have wire internet: only a 3G modem. Can I use AirPort without a cable? Or could I plug in the USB 3G modem into it instead?

[waw74]

usb port on the express is only for a printer.

if you do have a wireless network, the express can join that, so you can create a network from your laptop, and have that join, but that will only get you wireless printing and airtunes.

[apotheke]

That's what I need, thank you!