I have not set up any lock screen password, but any time I reboot it asks for the password, saying, 'To start Android, Enter your password.'
A week ago I experimented with the 'Lost your Phone' feature in Android Device Manager on my phone. I've set a password for that, and from then onward, whenever I rebooted, it asks for a password even I've set up. When I rebooted the last time I entered the password I've set up for ADM and luckily it worked. But this time it did not.
I've tried my Google password as well. How do I unlock my phone?