My S4 has been working fine with no issue, until about a month ago...my text messages are now being marked as read, and I get no notification that I have received any message, either by tone or vibrate. I begrudgingly did a complete factory reset (losing all the progress in some games, lost my amazon mp3 downloads...I know I can download those again but I only have a finite amount of times I can do so) and it did not correct the issue. Now I have to constantly check my phone to see if my coworkers or family have been texting me, and this is severely inconvenient.
Is this a known issue? I am really frustrated at this point.