I've had my Galaxy S5 for a couple of years now without any issues, but just in the last month something very annoying has been occurring regularly. At the top of every hour the phone automatically makes a chime noise and I don't know what is causing it to do so. I've gone into Application Manager under Setup and have turned off notifications for every single app that is on my phone. I've also double and triple checked every other category in the Settings menu as well, but to no avail. It's driving me crazy. Why would my phone all of a sudden start to chime at the top of every hour?