Can I sell my iPhone 4s if I do an early upgrade?

I currently have an Iphone 4s, I'm under contract until June 2013. Can I sell my iPhone but keep my contract and just put my sim card in another phone that is already paid for?

I'm wanting to get cash for my iPhone, although its looking like i might be better off selling my iphone for $285 back to apple so that I can upgrade to the iPhone 5!

Just. WHY.

Why the *** would you want an iPhone 5 instead of a 4S?

Oh, that's right.

Because it's COOL. Oh and the iPhone 5 has A WHOLE NEW ROW OF ICONS. Everyone needs that. You better line up bright and early to get the iPhone 5. Or else, your "friends" will strand you and no one will like you.

I'm sorry, I had a tiny bit of trouble understanding that. I think I've got it now though.

So, YES. Go and buy the NEW IPHONE 5 and be the idiot who updates their phone every time something from Apple comes out.

Kay.

If you want decent phone, buy an Android.

Or you can be a fanboy and stay a loser and end up divorced, homeless, friendless and crazy.

Your choice

This website will pay you $352 for the iPhone 4S 32GB, $325 for the 16GB and $295 for the 16GB
www.gadgetsalvation.com