My husband has a Verizon GS4 and when he gets a text message the # doesn't show up on the little messaging icon. It did when he first got the phone. He is usually where he can't hear the sound so depends on those numbers to know if he has any text messages. The one for the missed phone calls works. I have AT&T and don't have this problem with my S4.
Thanks
Heidijazz
Thanks
Heidijazz