Transfer unlimited data plan to new line and port out


macrumors 65816
Original poster
Jan 3, 2010
I have one of the older iphone "unlimited" plans on at&t along with the iphone 200 message plans. Can I add a line to my existing plan, transfer both the unlimited data and messaging to that second line, and then port out the original line to another carrier? I want the original phone number to port out. The existing line is out of contract.

Thanks in advance!