Verizon is nagging me to upgrade my phone to a Galaxy S7. But I haven't even learned all about my S4 yet. This video shows a bunch of things it can do, several of which I didn't know:
I'm sure the S7 has it's charms, but the S4 is more than filling my needs, and it's paid for, which means I'll be sticking with it for a while yet. Probably at least until I've got it all figured out ;-)
Galaxy S 4 Camera: Everything You Need To Know
25 Samsung Galaxy S4 Tips and Tricks in Under 10 minutes!