thanks to you all, but it still not clear.
i want to know if i update via NSU will need to deinstall titans kernel first or not. It´s a simple question.
At the link grant listed, says only via OTA i have to deinstall titans kernel.
And via NSU? do i have to deinstall the kernel?
another question came to my head, is if i simple click in the icon at N900´s menu to deinstall Titans kernel, it will get back to the stock Nokia kernel or i have to reflash my phone?