Return Policy

I got an S4 today on an upgrade. I have played around with it for a bit but I really do not like it at all.
I moved back to my iPhone 5 and I would like to get another one as a back up.

The phone is nice and everything but it is just too big for my liking.
Can I take it back or am I pretty stuffed?

Thanks guys

Edit: Sorry Guys, I see this is in the wrong section!!! My Bad