Apple has issued a statement to a number of press outlets including TechCrunch, indicating that all models of the iPhone 7 Plus as well as the Jet Black iPhone 7 have completely sold out ahead of Friday's launch and will not be available at Apple's retail stores. The announcement will help those who had hoped to purchase one of those models on a walk-in basis on Friday plan appropriately.

We couldn’t be happier with the initial response to iPhone 7 and iPhone 7 Plus, and we are looking forward to beginning sales through our retail stores and partners around the world. Beginning Friday, limited quantities of iPhone 7 in silver, gold, rose gold, and black will be available for walk-in customers at Apple retail stores. During the online pre-order period, initial quantities of iPhone 7 Plus in all finishes and iPhone 7 in jet black sold out and will not be available for walk-in customers. Availability at partner locations for all finishes may vary and we recommend checking directly with them. Customers can continue to order all models in all colors on apple.com. We sincerely appreciate our customers’ patience as we work hard to get the new iPhone into the hands of everyone who wants one as quickly as possible.

As Apple notes, it is possible that other retailers may have some stock of these models, but given that Apple prioritizes its own sales channels over other retailers, customers should not count on being able to find them elsewhere.

Apple announced last Thursday that it will not release first-weekend sales numbers for the iPhone 7, and given quickly slipping shipping estimates in Apple's online stores and extreme shortages of in-store stock for launch day, it appears early sales will be heavily constrained by supply rather than any weakness in demand.