: Go to Settings > Security and toggle on Unknown Sources to allow installation of apps outside the Play Store.
Google Play Services is the "engine" behind your apps. Without it, you can't log into your Google Account, use Maps, or even download new apps from the Play Store. Since updates are no longer pushed automatically to KitKat, you must manually sideload the final compatible version to maintain as much functionality as possible. The Final Compatible Version google play services update apk for android 44 2 hot
Because security patches for Android 4.4.2 ended years ago, these devices are highly vulnerable to modern exploits. Updating via APK : Go to Settings > Security and toggle
Google Play Services 21.33.56 (040408-334595314) – Android 4.4+ (armv7a) (nodpi) google play services update apk for android 44 2 hot
Go to Settings > Security > Check "Unknown Sources."