I have been trying to use the notification reminder in the settings because I like to have repeat notification sounds and vibration for unread text messages. But I'm noticing that when I try to use this feature, I am getting notification sounds for all apps. I did go into the settings and select the apps I specifically wanted to have the notification reminder for. But my phone keeps making the sound. I have even turned off sound notification for things like the system apps that work in the background. But still no luck. I have to constantly turn off the notification reminder because my phone is just making a notification sound for no reason it seems. I check it and there is no notification, yet it makes the sound every 3 minutes. I had set the reminder to only give the notification sound for my texts but it seems like it's just notifying me of everything. It's really frustrating.