I currently have a family talk plan with 700 minutes, my contract is up in February, and we have 3 lines in our family talk plan. I an one of the 9.99 lines. Does anyone know if i can buy and iPhone and replace my RAZR with it, and pay 20 dollars a month for the data plan, or do i have to do something all together different. Because a "supervisor" at ATT support told me all i had to do was activate it and add the 20 dollar data package. Will i have to renew my contract? If so, will it renew all 3 lines. Again the ATT "supervisor" told me all i had to do was activate it and pay 20 dollars a month, no contract renewal. In in other words, Im looking for some one who has a family talk plan and tried replacing an existing phone with an iPhone to see what happened. Thanks.