How to install apps from unkown sources in Samsung Galaxy Note 2 running on Android 4.3:
- Turn your device ON and select Apps.
2.Selects Settings icon. Note that settings icon may not be present on the first page and you may scroll the pages until you find the setting.
3.Under settings click on More icon as shown in the picture below:
5.Under security Scroll down a and you will find Unknown Sources Box un ticked. Just select it and you are done.