We purchased an HP Photosmart D110a. After trying to make it work wirelessly with our Sony Vaio laptop with Windows 7 64 bit, we called HP and were told no current HP printer will work wirelessly because we are using the USB 720 modem rather than a router. The technician said the printer needs an IP address which it cannot find with the USB modem. This confuses me as there must be an IP address with the modem or otherwise it would not function to connect us to the Internet, right? Also, our previous printer was an HP Photosmart C4500 series (4582 driver), and it did print wirelessly with the modem! I told the tech that, but it made no impression. MY QUESTION IS: there must be many of you out there who also use the Verizon aircard, what are you using for wireless printers????