Apple's suppliers are ramping up production of iPhone 7 parts ahead of the big reveal on September 7, but some manufacturers have been reportedly experiencing serious defects in the waterproof speaker and dual-camera modules for months now, and are yet to be resolved.
As a result, customers may initially face iPhone 7 shortages at launch as Apple's supply chain deals with low yields, according to a recent report in Nikkei Asian Review. An industry source familiar with the matter did not name any suppliers beyond indicating they're struggling to produce iPhone 7 parts in volume.