Here in Brazil the hardware and software are technically two different products, in such a way that you can't deny a hardware warranty repair due to software modifications. That's the good part.

The bad part is that manufacturers do that anyway because they know you won't pay the legal fees to challenge this in court. This strategy mostly pays off. If you're particularly annoying, or somebody from our customer protection watchdog happens to take interest in your claim, the company will fold and repair the modified device for you eventually.