Google is Adding Anti-Tampering DRM To Android Apps in the Play Store Slashdot
https://nu.federati.net/url/145914

Google has introduced a small change to Play Store apps that could significantly protect several Android users. From a report:

Earlier this week, Google quietly rolled out a feature that adds a string of metadata to all APK files (that's the file type for Android apps) when they are signed by the developer. You can't install an application that hasn't been signed during its final build, so that means that all apps built using the latest APK Signature Scheme will have a nice little chunk of DRM built into them. And eventually, your phone will run a version of Android that won't be able to install apps without it.

Where is my Linux phone?

I'm still waiting...