First off, I tried searching for this and also the news thread about it, but for the life of me I couldn't find it. Also, tried googling and couldn't find it. This is regarding the new AT&T family plans that come with 10GB of shared data that starts at $130 for 2 lines/phone. My question is this: With this new plan, is tethering enabled by default or is it an add-on? Thanks!