ok...so im on a family talk plan on att which includes unlimited text and multimedia messaging. the woman from att told me that if i added the iphone plan to my line that i wouldnt be eligible to be a part of that unlimited messaging. So my question is, since my phone is unlocked and att still thinks i have a samsung blackjack, could i just add an unlimited data to my plan like i would if i was adding it for a different phone? would that work? has anyone done anything like this? thanks!!!!