Can you play xbox live for free if you have wi-fi?

you have to get the Xbox 360 wireless adaptor first unless you have a slim but after you setup wireless you go on your computer and make a fake hotmail then go onto xbox.com and select not a member or else sign up fallow the steps then once done that get on your 360 and select recover than you follow those steps you can use that method as many times as you want unlike the 360 method