The phone needs an update. Last week Sprint said an update was available in 'about a week'. My phone does this too, but only with numbers transferred to it from my old (4920RL) phone. If I resave each number it then works right. Also if I try to send a text msg from the 'Messaging' (up arrow from main screen) and add names it then doesn't actually add them.. to send I have to go to that person in the address book, or use reply.