Follow along with the video below to see how to install our site as a web app on your home screen.
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go to messages and press menu button and all your settings are there
from what I understood the led notification settings are elsewhere.
if I remember correctly...
from home screen
menu.settings.display.notification flash uncheck what you don't want a flashing notification for.
I don't have the aria on me right now, and you may very well find access to these settings from both locations