Ok, just looked it up, it says you have to switch to Unlimited Plus with
an eligible phone purchase.
So minimum,, depending of the Phone, is $150 a month ( including a Samsung Phone) and a 2 year contract, so you have to spend $3600 to get free ST for a year.
Or my way, my Cell Plan is $25 a month, so over the same time frame, $600 + $249 ( what I paid for ST ) is $849.
Great Deal.