Made the mistake of upgrading to IOS4 which has significantly impacted performance. Apple don't allow you to revert back to an older version of the OS. Looked everywhere for advice on this but I can't seem to SEND email from my YAHOO account I can receive but can't send. Getting a message along the lines of: "unable to send, a copy was saved in your outbox" Weird thing is, it DID work previously. Any solutions/ideas on either of the above issues? Ta very much.