CONTRACT NOT UP, AND I WANT IPHONE 4!?

I have verizon....and i got a new phone in september 2010. (2 year contract). And now the iphone 4 was released for verizon and i really want it, but i dont know how to get out of my contract or i dont even know if I can. help?! Is there anyway I could get an iphone now even though my contracts not up..Please help! thanks!!