Also, as
pointed out before, if you choose to manually install Lollipop KSU1BOB8 firmware on a rooted smartphone, you will end up in revoking root access and in restoring your S5 back to its initial state — therefore, this
step by
step guide can also be used as a troubleshoot solution (by flashing stock Android 5.0.1 OS you can resolve issues like boot loops, lags, bugs, force close errors, screen
freeze, battery drain, heating problems and even total blackouts).