how to install non-google play apps in android

Hello guys now a days android market going so fast. People are selling it due to high class apps and useful apps.
In google android you can play android apps .The Google play gives you service to download free applications from google play.
Sometime you want to download apps from non google plays Here we are going to tell you how can you install non google plays apps in your android.

Change permission to install non google play apps in android method:

1.First of all press menu button then goes to settings, or access settings from anyway

2.Then goes to security option

3. Then change the settings as

After settings that now you can download and install any applications from non google play websites.

Important Security Note:

After that settings you can install any UN trusted apps. May be that un trusted applications pose a threat in your device. So always download apps from trusted websites.