Apple may only launch one of two larger size iPhones this fall, according to UBS analyst Steve Milunovich. Barrons relays the research note which is based on Milunovich's "checks" of the supply chain. iPhone 6 rumors have repeatedly suggested that Apple is working on two new sizes for the iPhone. Predictions most commonly include 4.7" and 5.5" sizes, up from the current 4" screen of the iPhone 5S. Milunovich's report agrees that Apple is working on those same two models, but isn't sure both will launch: an “iPhone 6” is most likely to come in August or September, rather than June, in tw