My AT&T contract expires soon and I was looking into getting the LG Optimus from T Mobile. It has wifi capability and can use a wifi network for intenet access. I want to keep my monthly bill low so I was going to get the minimum data plan for the phone. What I'm wondering is can I use my home wifi network and still get access to all the features like the android market, youtube, etc. I was also wondering if I do go on the internet using a wifi network will it use up my allowed data per month or will it be free?