Again, can't take this at face value, people have gotten this answer, then when asking for a guarantee, notation on their account, and/or supervisor verification, the CSR walks it back. The training manual is ambigious on this as well, It states that for exchanges, a customer can't go back to their unlimited data... however this section seems like it only applies to people who buy new phones after the 28th, and know they are giving up unlimited. But who knows...