If your device has an unlockable bootloader, install a lightweight Android 4.4 or 5.1 custom ROM. This brings a natively supported Play Store.
Manage your expectations. Even with a successful google play store android 42 2 apk install, you will face limitations:
Oddly, auto-updating the Play Store itself can sometimes revert you to an incompatible version. To prevent this:
Installing an APK (Android Package Kit) manually is a process called "sideloading." The main reason to do this is to bypass the server-side rollout. If your device is stuck on an older version and you want the latest security features immediately, manually installing the 42.2 APK is the only way to get it right now.
