If youre thinking of picking up a shiny new iPhone 6 on launch day, you may have to reset your expectations. According to a new report, Apples suppliers are having trouble producing enough screens for at least one of the two expected devices, which could seriously limit availability. Based on what two supply chain sources told Reuters, Apple wanted to initially use only one layer of backlight film on the 4.7-inch iPhone 6 in order to make it as thin as possible.