Apple Inc. may have delayed mass production of the OLED iPhone to September or early October, according to Longbow analyst Shawn Harrison.
Harrison believes the delay is very fluid and noted “the new A11 processor, Touch ID and OLED screen” as factors for the delay. He also does not see it affecting iPhone 7s/7s+ production.
Apple is expecting notable growth in iPhone shipments in 2018 and is currently supporting capacity additions by suppliers.

=> Original article  Apple's OLED iPhone Production Ramp May Be Pushed Back Until Early Fall