I broke my phone and I want to get an iPhone4s?

I broke my phone going for a walk, and i still have 2 years on my contract. I want to get an iPhone 4s, but is there anyway I can get it without changing my plan? Or the price of doing so? It would be greatly appreciated. And I would ask my parents, but long story short it would not be very wise for me.

Yes you would have to buy the 4s on its own roughly £400 and then go into a phone shop and ask for a micro sim. After that call your service provider and transfer your old number to the micro sim. Done