My phone started doing this about three weeks ago. It gives me this popup notification about once an hour, every hours, 24 hours a day. I have synced my contacts. This is driving me bananas. I am attaching a screen shot. Please. Help. Me.
Oh wow, I just looked. It seems the icon matches the icon for AT&T Address Book. When I click on my AT&T Address Book, my phone goes blank for two seconds and nothing happens. I just uninstalled this. Let's see if it stops the problem!