Once i got my 3DS XL the first thing what i did (after i got MK7) is tried the online. How was it? Bad, the reason is that i was getting Communication error and i still do have them. Asked ISP to change my modem but it still didn't work. I had Zyxel and atm i have Billion. I have ridiculous long login time(login to Nintendo Network) and the connection seems to cut off(?) when i play. People said its cause of the Modem so i thought to buy 1 but i don't know which one to get so I want to ask you guys which modem works with the 3DS.