Can apple replace my iphone?

I got an iphone 4s an unlocked one from virgin mobile which almost cost or did cost 500 dollars! This was febuary 2013 it would freeze on me if i was playing music, games, internet, or calling i asked my cousin that same week when i got if it's normal for it to do that she said yeah some of my friends said that's never happened to them at first i'm all like yeah it probably is normal but over the months it started freezing on me more and i had no clue why but it did not really bother me now its starting to bug me is it possible i apple can give me a new iphone or refurbrished one? I still have the box and charger but lost headphones my iphone still looks new its just the freezing part gets me mad now and it will only freeze whenever the phone wants 2! And i also don't have the warranty.

Added (1). Oh yeah forgot to mention one thing when i charge it usually heats up? And i only leave it for an hour to charge.

Yes they will but you will have to pay for it. As long it is not jailbroken. They will give you a refurbished phone