I have Android device manager installed on my unrooted N5. I am able to locate it and select the "ring device" function from a Web browser. When I click on the "Setup Lock & Erase" I get the message : To use the lock or erase option, you need to turn them on for the selected device. Send it a notification to get started. I click send and get the "Notification Sent". But that's it, I get nothing on my phone! Has anyone else got this working? I really want to be able to wipe phone if it gets stolen.