Update: According to posters below it doesn't work on their fascinate.
You can control the screen brightness, by swiping right or left, up where the notification bar is.
if it doesn't work, try turning off power saving mode.
settings>sound and display>power saving mode uncheck
Hopefully this works.
You can control the screen brightness, by swiping right or left, up where the notification bar is.
if it doesn't work, try turning off power saving mode.
settings>sound and display>power saving mode uncheck
Hopefully this works.