https://play.google.com/store/apps/details?id=net.megawave.flashalerts&hl=en
or
http://software.megawave.net/flashalerts/2017/03/16/flash-alerts-v2-2-1-update/
<br>
<br>
Officially from Samsung - didnt work
http://www.samsung.com/in/support/skp/faq/1092162
