A common question we hear from customers who own or are considering owning a 3G or 4G mobile broadband modem is "can I get online and play multiplayer games?" The answer is yes, you can get online to play your friends! To get your 360/PS3/Wii online via your 3G or 4G connection, you'll need a Cradlepoint, Nexiara or WiFi Ranger router, which allows you to provide connectivity to multiple devices and optimize your connection for gaming. In fact, when you purchase your equipment from 3Gstore.com you have access to our exclusive gaming tip sheets and technical support for free!
You can read the full here - Can I play the PS3/360/Wii with a 3G/4G Connection (Online Gaming)