How to install a free APK file?
Before you can install it on your device you will need to make sure that third-party apps are allowed on your device. Go to Menu > Settings > Security > and check Unknown Sources to allow your phone to install apps from sources other than the Google Play Store. Once you've try to download the APK file the device will ask This type of file can harm your device. Do you want to keep name-of-apk.apk anyway? Tap you answer when prompted, it will be OK, later just follow the steps. Please verify the APK you want to install is the original file or scan for virus and malware using a local antivirus in your device.