My wife has a Hero and a few of her "conversations" have a large number of text messages. On my Evo, I can set it to only keep a certain number of texts in a conversation (mine is set to 150). In the settings for messaging, that is the only thing that is missing from her's that mine has. Does she have to delete messages individually or are we just missing something? Can the storage of her converstations be limited to, say, 150 messages automatically?