So pretty much my phone plan is up, so im going to get the 3G. Right now im on a family plan. My question is this, if i buy the 3G through at&t with them activating it and i wait until after 30 days and cancel the plan, yes paying $175 doing for the early termination fee, will i be able to return to my old data plan with my old sim card to be back on the family plan? i just dont want to pay the $30 monthly fee. any ideas would help. Thanks in advance.