Original Samsung smartphone screen assemblies are notoriously expensive, and the cost of a replacement can often be nearly as much as a replacement phone. The main reason for this is that the production cost is extremely high, the most recent Samsung screens are manufactured using Active Matrix Organic LED(AMOLED) technology and are produced by Samsung themselves. Manufacturers of third-party displays which are mainly produced in China & Taiwan try to master the exact technology that Samsung uses, they basically manufacture second rate inferior copies.