Assuming your phone is on and online, you should be able to see its location on a map. From there, you can make it ring, lock it, set a lock screen note to tell whoever has it how to get it back to ...

Version 48.8 of the Google Play Store is giving users an easy way to uninstall apps remotely from other devices.

You don't need the power button to restart your Android. If yours is broken or you simply want options, here are two.