Earlier quoted context omitted.
This is like claiming that you did not pay for your milk unless you also purchased other groceries when your local supermarket uses a loss-leader strategy.
No it's not the same at all. The ads say '$199 with contract .' And the fine print always explains you have to enter into a 2 year contract with the cell service provider, and that said contract will make you liable for early termination fees etc. if you try to skip out of it. For the last decade I've bought my phones unlocked and subscribed to a monthly plan that I can leave at any time. That means paying full price…
So who owns it? When last I checked, there was no line of credit, I am allowed to sell the phone to someone else without informing the carrier, and I am responsible for repairing any damage or replacing the phone if it is rendered non-functional. It sounds like I paid the carrier's price, signed a contract, and then owned the phone (while being locked into a contract).
There is more to this than just the carrier's contract. Let's say I travel to another country, and I want to pay for a phone plan there so that I do not have to pay roaming charges. I'll need to unlock my phone to do that...and now by law I cannot (at least not here in America). For that matter, suppose I am here in America and I want to have two contracts with two different carriers on the same phone...once again, the law stops me. This is, plain and simple, a law that protects the carriers' business model in ways that other businesses are not protected.
Don't fall into the trap of thinking that the free market is relevant here. It is not a free market when some players get special privileges and protections not available to other players. Cell phone companies get lots of special privileges, and this is just one more to add to that list.