Every time I do the "AT&T View Data Usage," the notification volume goes down near the silenced level. I then have to go back to any app (or go to settings) that sends me notifications and change the notifications volume to what it was before the volume dropped. But if I delete the AT&T data usage message and do it again after a while, the notification volume goes down again. It does that no matter how many times I fix it. How do I set this volume so that it won't go up or down unless I set it to? Why does that happen? Any suggestions on this (except for something like, "Then don't delete that message.") are welcome.