SMS app is not sending notifications

In Settings>Notifications>Messages make sure you don't have Alert Style set to None.

Try stopping the Messages app and resetting your phone: double tap the home button to bring up the recently used app list at the bottom, locate the Messages app (swiping if necessary), press and hold on it until it jiggles, tap the red minus sign. Now reset the phone: hold the on/off and home buttons simultaneously for 10-15 seconds until you see the Apple logo (ignore the red off slider that appears first), release and weit for the phone to restart. See if that clears it up.

Yea, I knew it was a long shot. Since the problem is tied to your 3GS backup there may be no way to fix it other than to restore as new. If you really want to save your message conversations there is 3rd party software you can purchase that will allow you to save them on your computer for printing/viewing (but not for importing into another phone). Examples are PhoneView and Touchcopy.

I haven't seen this problem before. You could try turn off Message Center off for messages (and perhaps even turning iMessage off in Settings>Messages), resetting again and turning everything back on.

This was the final step in a series of attempts and it finally worked for me... finally after an hour or two of reading every post I could find on getting repeat alert notifications. I closed the app (double clicking home and pressing the red circle with the white line in it which turned off the messages app). Then I held the home and off button until the apple came on... I had also reset the DNS service numbers to 8.8.8.8,8.8.4.4: I also made sure that the badge icon was on, a sound was selected and I had it turned to repeat alert 3 times. When I tested after doing all these things the repeat worked. I decided I wanted to turn it to repeat 10 times and it didn't work.... so I held the home and off button at the same time and it reset so that the alert repeats 10 times. Perhaps the combination of all these these things did the trick, or maybe it was just the home and off button reset...

I has same problem - I wasn't receiving notifications about SMS even it was on at the notification centre.

How to handle it:

1) Disable all notifications on messages

2) reset the phone by Power and home button

3) turn back the notifications

Now they work again.