well, someone had to have put that phrase in there deliberately. your contract is an agreement to pay the cellphone carrier a certain monthly fee for a certain number of months, with early termination fees written in, all of which you are already bound to by civil law. it should have nothing to do with phone unlocking.
There's zero chance the white house overlooked anything accidentally here. These responses are VERY carefully crafted and reviewed by dozens of lawyers and other white house staff.