The first important thing we need to do is enable the Unknown Sources to feature for our Android device. This has the effect of helping the system bypass and allows users to install applications and files that are not from official sources.
Allow the device to install APK file
You click the Settings icon – Settings on the device screen, then click on Security and tick the box Unknown Sources – Unknown Sources.
However, you also need to pay attention, when performing this operation, all “unsafe” software and applications will be able to install on your device, which also means viruses, trojan, with its danger, should be very careful when installing.
After allowing the device to receive software and applications from external sources, we begin to install the apk file for android without going through the Google Play Store.