Reuters On iPhone 6 Production Issues
Two supply chain sources said display panel production suffered a setback after the backlight that helps illuminate the screen had to be revised, putting screen assembly on hold for part of June and July. One said Apple, aiming for the thinnest phone possible, initially wanted to cut back to a single layer of backlight film, instead of the standard two layers, for the 4.7-inch screen, which went into mass production ahead of the 5.5-inch version.
Every year, it is reported that Apple is facing production problems with new products. With Apple’s relentless push to adopt new technologies at immense scales, like the single-layer backlight mentioned in this case, it’s not really that surprising that they frequently have issues. However, as long as Apple is equipped to deal with such problems (that they must expect), there isn’t really a “problem” at all. Given the iPhone’s consistent release cycle, I think you can say that it is true.