US Cellular Upgrading?

I have been a costumer of US Cell. for many many years. For the past 2 years or so, I have had a smartphone plan with 3 lines on it, and I wanted to add 2 smartphone lines. My contract terminated some time back, so I no longer have a contract and I can leave (If i wanted to) without paying, or anything. I was on the website looking at the "Free phones". I know they are free if you are a new costumer, but for example, I was looking at the Galaxy s3, and it said 99.99 per new line, and 99.99 for every upgrade. Would mine be 100 dollars for each of the 3 upgrades?
So, I really need to know, since those 3 are availible for upgrade, what price would I get on them? The 99.99 or the free? And would i get the 99 or free price for the two new lines added to the family plan??