How to solve the problem of broadband error 691?

Broadband Internet display "error 691" is due to account password input errors or fees due, such as you have a router, you can first power off and restart, if still can not be used, it is recommended that the router can be removed to carry out the following tests:

1, please confirm whether the broadband is in arrears or expiration of, if there is a bundled cell phone, please confirm that the phone If you have a bundled cell phone, please confirm whether the cell phone is in arrears, suspended, suspended, or dismantled. If any of the above conditions exist, please renew or pay off the arrears before trying again;

2. Please try to re-enter the broadband username and password, or re-establish the broadband connection.