The "free internet with no mobile data plan" seems a stretch, unless you consider the speed ok.
> Bräunlein reported that he could send at about 20 bits/second and receive at about 25 bits/second, but that his hidden data “messages” took anywhere from a minute to an hour to arrive.
> Bräunlein reported that he could send at about 20 bits/second and receive at about 25 bits/second, but that his hidden data “messages” took anywhere from a minute to an hour to arrive.