Android phones will soon reboot themselves after sitting unused for 3 days

A silent update rolling out to virtually all Android devices will make your phone more secure, and all you have to do is not touch it for a few days. The new feature implements auto-restart of a locked device, which will keep your personal data more secure. It's coming as part of a Google Play Services update, though, so there's nothing you can do to speed along the process.

Google is preparing to release a new update to Play Services (v25.14), which brings a raft of tweaks and improvements to myriad system features.