I tried this ROM my friend. but nothing has changed. there is a need for a software hassle free. also twrp recovery or CWM recovery is required. because the original recovery does not work.
twrp and cwm are custom recoveries, which I presume affects warranties, also they are a community thing so you'll need to do it yourself by porting it.
the original recovery is bad. it doesn't work. have problems with wifi and audio. we can't find a solution to these problems. you the warranty you are talking about. it wasn't an issue with the stock ROM. why I will spend the effort to custom ROM.