Due to the slow manufacturing speed of OLED displays, Apple will only produce 4 million iPhones by September.
In other words, Samsung, which is the only OLED monitor maker for the upcoming iPhone, can not align production with estimated demand, so stocks in September will be extremely limited.
Although Apple had estimated that it would sell up to 60 million OLED iPhones this year, taking into account production problems experienced by Samsung at this time, these numbers are unlikely to be achieved. The number can reach 10 with 15 million if production is accelerated over the next few months.
Fortunately, the production of iPhone 7s and iPhone 7s Plus which are expected to come with an IPS LCD screen is going well enough so there will be no shortages for these two models.
But Apple, considering the new iPhone 8 to be the most exciting product, is looking into the problem and working with Samsung to find a way to boost production in the months ahead of its official launch.
Informally, previous generations of iPhone reached 10 million sales only on the first weekend of circulation, which means that a stock of 4 million units will definitely limit availability. Recent rumors even speak of delaying the iPhone 8, with its launch in October to make the company build more units.