I read a post about edge lighting saying it worked only for the stock Samsung app. That answer is wrong. Mine won't work for that app at all. I get it to work only with the Verizon messaging app but only when the screen is on. I have set everything g the correct way, but to no avail. It works fine for the Verizon messaging app with the screen on but for nothing else. Also, it doesn't work at all with the screen off. Stop telling people it only works with the Samsung messaging app when that is not correct. This needs fixed.