Default messaging App in Kitkat 4.4.2 based Samsung Smartphones

You can select the Default Messaging App between Messages and Hangouts in Android OS 4.4.2 KitKat based Samsung Smartphone. In Settings of Messages, You can now select the Default messaging app menu.


(Default message app options)
Know more about Default message application :

• Setting Hangouts as your default messaging app will prevent you from using some messaging features of Samsung applications.
  
• After selecting the Hangouts, you can return again to Samsung Messages app.

NOTE : Android Kitkat 4.4.2 is compatible only in Samsung Galaxy Note3 as per now.