Iphone 4 replacement out of warranty
So i am currently using a 16 gb iphone 4 for at&t. My lock button had recently jammed so i need to get it replaced. I have done some research and concluded that to replace the phone would be 150 bucks but for a 4s it is 199. Is it possible that i can pay the 199 and get myself a 4s instead of the 150 for a 4? I really need answers as soon as possible since my appointment with the genius bar is on tuesday. Any information helps!
iPhone 4, iOS 6.1