Do not confuse the Play Store’s APK version with the Android OS version. Your Android remains 4.2.2; only the store app updates.
: An alternative store often used to recover the Play Store on older hardware. Troubleshooting "No Connection" Errors google play store android 42 2 apk install
If Play Store is already installed and you get “App not installed” error: Do not confuse the Play Store’s APK version