You dont have yo if you don't want.
If your getting a pop up asking if you want to use the other messaging app then fmgo into Settings > Apps > Choose the app and disable / force stop it.
In regards to your home screen you can go into your Settings > Home Screen > Lock Home Screen Layout.
Daily Driver > Samsung Galaxy s²⁵ Ultra 512Gb ~ Titanium Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
