mobile

I have samsung galaxy s5 (sm-g900f) from my country Philippines... my phone is a postpaid plan from "SMART" one of our country service provider... the phone can only use sim card from SMART... the problem is i want to use any sim card in my country but i cant because the phone is lock... i have search in web and found a OFFICIAL firmware of S5 from our country and it is already Unloack (OPENLINE)... i want to flash this using ODIN-PC to make my phone OPENLINE and so that i can use any sim in my country... what i'm asking is does it void the warranty if i do this to my phone???