So I have the Samsung Galaxy s5. And at least once or twice a day my phone will make a two toned notification sound but when I look at my phone there's nothing there.... there is no new notification...there's nothing. I have heard from several people that it could be Yahoo or roaming. But I don't have Yahoo and also I'm almost never roaming so does anyone else have any other ideas because this is super annoying. Also this weird notification happened when I first got the phone it didn't happen after installing a new application or anything.
