Galaxy S4 Every 5 minutes the chime for a new notification sounds. The upper left notification bar is empty, no new email or text, nothing. How do I shut this off? Earlier today I had to turn off the phone completely, when I power back on it does this nonstop. I did trial and error last time and finally got it shut off, I don't remember what it was. Gmail? Email? Clock? Weather app? Roaming? OMG! I put it in airplane mode and it still made the sound, every 5 minutes. I set the volume (for notifications only) all the way down so I can sleep.
under settings go to my device and blocking mode, start blocking services one by one, until you find the one that causes it.
If you get notification even under Airplane mode, it might be the Knox software, did you play with it recently? I had that happened to me when I first installed Knox and I disabled it.
Go to Settings, My Device, Accessibility, and scroll down to where it says Notification Reminds and turn it OFF. If you have any unread e-mail or anything at ALL, it will keep doing the Notificiation until you are ready to throw out the phone. It took me awhile to find it and I felt like my phone was useless to me. I would miss calls, texts, and everything else cause I could not stand to have the sound on. After finding that I feel like I have a phone again.