Add another data point to the heaping pile of Apple may announce in September.
According to Morgan Stanley analyst Katy Huberty, we may not see the new, least-expensive 6.1-inch model until October. That's thanks to possible quality-control issues with the screen's backlight.
As quoted in Barron's as part of larger speculation on Apple's stock performance, she says:
We currently see no delay in the ramp of Apple's upcoming flagship 5.8-inch or 6.5-inch OLED iPhones. However suspected issues with LED backlight leakage have caused a one-month delay in mass production of the 6.1-inch LCD iPhone, although this is down from a six-week delay baked into the original production forecast, according to suppliers.
We asked Apple to comment on this rumor about a delay to a rumored product but, unsurprisingly, did not hear back immediately.