blackberry’s issue.
BB type: 9780
Symbol:  error 606, can’t boot.
Resolution: first install a newest rom(7.0) download from blackberry official website. The error 606 is solved, boot sucessfully. but still can’t receive E-mail, the edge is in small letters. When reinstall a 6.0 version, the EDGE become into capital letters, it can receive E-mail normally.