You have to have gps and Google location services enabled for it to locate the device.
AT&T HTC One MoDaCo.Switch Beta 8
Nexus 7 2013 Unlocked Root + TWRP
Chromecast
False...I simply use Google location services and it finds mine every time. Also, if you send the format device signal, and the phone is off, as soon as the phone turns on, it formats it. I did it on mine. Same with the ring function for a wireless tab. I was in a non-wifi area, selected locate and ring, and soon as I got to wifi it rang, and Google now located it.