I have set up my yahoo account in my iphone, wen I'm connected with WIFI, the email push comes in seconds, but when I'm connected with EDGE, push does not come through. Can anyone help? I have also noticed something strange, I have followed the instructions from other thread that to put imap.apple.yahoo.com in the IMAP PREFIX under setting. When I do that I only have the Inbox folder in my yahoo account. If I leave out the IMAP PREFIX, I have other mail folders, such as the trashcan, bulkmail, sent mail and etc. Really have no idea what's going on.