ok, this happened to my daughters iphone 4 first. she has a bell next to my sons name in her messages. she does not get any notification when he sends here a text but it is there. its not in the contacts. now I have it next to one of my customers names. she can call me and all is good. but if she sends me a text no sound or notification. but the text is there. I have gone through every setting I can think of and cant find it. and I have several hundred contacts and its only on this one.