Question [q] root sgh 1337m 4.4.2 help

Hello everyone i have a rooted sgh-1337m, it is currently on 4.2.2, what steps do i need to take to get to 4.4.2, do i unroot first and then ota update then root again, or is there a more efficient way. Sorry if this comes across as a "dumb" question im new to this android stuff. thank you very much please be as detailed as possible. Thanks!