I think that for packet injection he may need a usb wifi adapter. I could be wrong but I think unless something has changed with aircrack for maemo we still need a usb adapter for packet injection. If you need a usb adapter you can get a otg-usb cable or get usb host and get this a usb gender changer, or if you are looking for something off the shelf you maybe able to find a usb cable with changeable tips for both sides of the cable. I can't find it now but I remember getting the cable from staples, but since you have an n810 even with the cable you would still need a micro to mini adapter.