Samsung Galaxy J7 V / J7 (2nd Gen.) - Set Default Messaging App
From a Home screen, swipe up then navigate: Settings > Apps .
Tap the Menu icon (upper-right) then tap Default apps.
Tap Messaging app then select one the following: Setting an SMS app as default disables other messaging apps and their features. Available options depend on the apps that are installed.
Hangouts
Messaging
Message+
If you've upgraded or switched devices and your old messages aren't appearing, you may be able to restore them via one of the following methods: