For those of you looking to update to the latest Android operating system on your S5, you need to take a look at the latest MIUI 8 ROM with Android 6.0.1 Marshmallow. Based on latest Android 6.0.1, this ROM brings you the latest MIUI 8 and lot of customizations.
Out of the box, you will get all of the latest Android Marshmallow features along with CM13 features like AudioFX, CM themes (compatible with all CM13 themes), and more.
Download Galaxy MIUI 8 ROM (For G900F, G900M, G900T, G900W8 * G900FD, G9009D * G900I, G900P, G900V * G9006, G9008, G9009W * SCL23, SC04F * G900S, G900L, G900K * )
You dont need Gapps for this.
Please Follow the Instructions carefully and if you have any doubts ,watch the video carefully!