This USB stick can be plugged into any Windows computer (not sure if Mac is supported) and enables a WLAN connection. It doesn't matter if it's the airport WLAN or the WLAN at home. The router at home doesn't matter either. With my PC it was plug&play. Hope this helps. (:

Compatible with UPC WLAN? Yes, why not?

It accesses any WiFi network as long as the driver works.

Yes, I have reconnected a PC with a defective WLAN module to the UPC/Sunrise router with this device.

Yes, it worked immediately for me too, both with upc and with yallo wifi box. Plug&play