Rafael Rivera was one of the ChevronWP7 Windows Phone unlocking app. He also was the first to reveal that a flaw in Yahoo’s IMAP email implementation was the cause of the massive and previously mysterious data uploads from some Windows Phone devices. Some phones were sending 20 to 30MB of data per data over 3G even when WiFi was turned on and available. Yesterday, Rafael noted that:
This resolves a problem that caused 25 times more data to be send that was actually required by the email protocol. As Rafael also mentions, the Yahoo email problems is also supposed to be fixed by the “NoDo” update for Windows Phone which has yet to appear.