I just purchased an Android mobile device, and was exploring its great features! I mistakenly activated the Google Android Device Manager found on my phone just to feel how it works.
Meanwhile, I realised I've done wrong enabling the remote lock when I later got my device rebooted! Phone was on, but all I get is a black screen. I cannot unlock or perform any operation as there are no optional suggestions provided to get it unlocked or deactivated by the user.
What can I do to access my device again?