[AC Question]

On the back of the phone I've seen dome phones that flashes when a message or call come through.

[H3aTeRzz]

Hi

It really depends your device. For example, On my Note 5, I have to goto settings>personal>Accessibility>hearing......Select Flash Notification On.

Hope this helps

Chris

[B. Diddy]

I think I've only seen Samsung phones with this as a native feature. There are probably 3rd party apps that can add the feature to any phone.