Can both AT&T Uverse High Speed Internet and Comcast High Speed internet be used in the same household?

I live in Bay Area, California, and i am trying to get 2 different internet providers at the same time because i have a roommate who doesn't want to share the internet with me. Thanks|||Provided there are 2 lines into the building.|||Yes.you can take the two Ethernet cables and join them with an accessory then have extream internet