Can someone confirm this... I opened a new line on my account, so can I just take the 5 to the store tomorrow and have them add it to my main line? Currently I still have the 4S. I want to put that on the new line. Actually I have plans on selling that phone and use a dumb phone on that line (making it $10 a month extra). If yes, I'm sure I can call att this weekend and dump the data and unlimited messaging on the new line (had to add these features to pre order) Is it any easy as it sounds?