Locked by Android manager I've used android manager to make my phone ring and Locked it by setting a password wish I never had. But unfortunately when I found the phone I was not able to deactivate the password because all option are dammed and the only one showing is password. 
I need to change it again to none.

any ideas ?
if this phone is yours do the following :


login to you device manager on google website here
click on lock and set a new password this will over-write the old password
on your phone enter your new pass word 


If this phone is not yours contact the phone owner and ask him to do the last steps