Ive been using my dads old iPhone as a iPod touch for a few months now and it looks like my conrtact with my other phone is up, Im looking to switch to att and i was wodering if i sign up for the data plan will it be the old 20 bucks for edge or still charging 30? I really dont need to have 3G and Im mainly around wifi as well thats why im looking into that as a alternative. thanks for the help.