I just recently know about Android Device Manager. So i tested it on my own phone (moto g2). Then i thought, lets have some fun. So, i ask for gmail account and password from my friend. After getting that, i went to google in her account and then to Android Device Manager. But her phone (Mi4i) had just two option into it "ring | enable lock and erase". So i just click on option "enable lock and erase" hoping that before doing anything it will ask yes or no. But instead it said done or something. Just tell how can i undo it and what exactly happened when i clicked that button?? i would really appreciate.