The supplier of Apple’s sapphire displays is quickly becoming one of the most reliable sources for news concerning the next iPhone. In its latest financial report, GT Advanced announced that it expects a major boost in revenue in the second half of 2014, suggesting that a summer release for the iPhone 6 might have been wishful thinking after all. “The company expects that 2014 will be a transformational year, one in which it builds a sapphire materials business while continuing to invest in the new technologies that will drive its equipment business in 2015 and beyond,” GT Advanced states in its report. “The company expects that revenue and profitability will be back end loaded, with its sapphire materials business ramping