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Help LED doesn't works when display is on

Lightflow app on play store should be able to do that for you - but be aware that on the s4 (due to how Samsung has coded the accessibility features), it may cause the phone to speak some of your selections out to you - example: it may say "checkbox selected" when you select pictures from your gallery. From what I've read, it is a Samsung bug (doesn't occur on any of my other devices)
 
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