android 5.0 to 5.1.1

hello, I want to know if anyone knows how to update a Samsung S 5 G900F Vodafone Spain lollipop 5.0 to 5.1.1. I have understood that the S 5 T Mobile and updated and let me know if there is any way to update the terminal lollipop 5.0 to 5.1.1. I clarify that I'm root and I have not gotten any response from anyone so far
Thanks