Yahoo! Messenger is currently not available for AT&T users in the United States...you would need the service books and AT&T won't support it, I think the only way to get yahoo on the 8700 is through MediaNET, open medianet go to mail and messaging, then go to Yahoo messenger and log in from there...you can also go to the yahoo webpage and try to install yahoo!mobile client from yahoo...Yahoo!Go is supported by the 8700 but it lacks messenger.
