How to find out using Verizon's "My Verizon Mobile" app:
Open app.
On the HOME screen scroll to the bottom. Click on Verizon Support button.
You will leave the app and be taken to your web browser: hit continue.
On the verizon support page find your phone, click on the "Support for Samsung GalaxyS5" button.
Click on How to Use
Under GOTO: Operating System and Software:
Samsung Galaxy S5 Software Update Benefits.
Enjoy reading about tracking, emergency calls, and camera shutters as well as bug fixes.