I have the same problem but it has to do with SMS. I have the latest version of OS6 and don't have the SMS/MMS ICON only a Text Message icon. When I select Text Messages and then go into the options and select Send Text Message I get a screen that prompts for To:. If I try to send a text to somthing like 40410 the device comes back with a message "No matches: 40404. I know this is a good number, any idea how to get around this problem?
If I send it to a phone number or use the contact list it works fine