somebody has to open the iPhone and replace the lcd. The cheapest way is to do it your self and you should get aways with around $70. The part is available on ebay. Here's a iPhone Repair guide on how to disassemble an iPhone on ifixit.com or http://www.portatronics.com/guide. Maybe a tech savy friend can do it for you. If you want to pay to have a service do it for you