I have a phone that is completely locked and usb debugging is off. How can i make the phone usable again?
Does it have twrp? If it does perhaps there is another way around that helps to reset forgotten pattern lock / security PIN / password from your Android device without having to lose your precious data. 
 folder, thus resetting Android’s security.
Ketan from XDA Developers forum has developed an intelligent hack file, that needs to be flashed on your Android device through custom recovery and bingoo!! your phone’s security code / pattern lock and password will be removed. This hack basically instructs your phone to remove the files which tell android that the phone is locked to show the lock ui. If the device is protected with a pin or password it will skip it. If it's protected with pattern then it will not skip it but don't worry you can input any pattern to unlock it. Downloads: http://forum.xda-developers.com/attachment.php?attachmentid=2245081&amp;d=1378720290 I hope it helps if it doesn't tell me there's another way to do it!!