Released in June 2014, Android 4.4.4 was the final security patch for the KitKat generation. It introduced:
If your Play Store is missing or not working, you can manually sideload these APKs from reputable community mirrors like APKMirror : google play store apk android 44 4 full
Handles cloud messaging and data sync. Google Play Store: The actual user interface for apps. Released in June 2014, Android 4
Even with the correct , you may encounter issues. Here is the fix for each: Released in June 2014