Correct, but that does not mean you just get another one when you call them. If you call the carrier they will just shunt you to Samsung, unless you have the carrier protection plan that covers mechanical stuff, and Samsung will try and fix the device. At least AT&T will shunt you to Samsung, they did with me. They will not just straight up swap out of a phone 99% of the time; at $700 to $1,000 a pop that would be an insane cost for Samsung or a carrier. Like most major electronic companies they will try and fix it first as that costs much, much less.
Though it would be very nice if they just swapped phones. Would save quite a bit of hassle but considering how much these things cost I can definitely understand them wanting to try and fix it first.