I have a contact named "Twitter" (40404) in my address book and set it to have the Twitter ringtone instead of the Tritone but whenever I receive a text message from 40404 I still get the Tritone sound and not the Twitter. I know this works because it worked before on my iPhone 4 but now that I have a 5 and iOS 6 not sure if its a bug or something. I've tired rebooting the the phone but I'm still getting the same results. Anyone experienced this? Furthermore, it behaves on other address book entry. I changed one of my conatact's ringtone to Twitter but when she texts me I get the same Tritone alert tone however when she calls me the Twitter alert tone works.