Per-orders for Apple's iPhone 7 and iPhone 7 Plus opened in the wee hours of September 9. As is often the case, the initial supply went quickly - perhaps aided by the fact that Apple and its wireless carrier partners somehow managed to get their act together this year to make the process as smooth and seamless as possible.

Traditionally, those that don't secure a pre-order from the beginning for whatever reason still have a shot at getting a new iPhone on launch day by visiting an Apple Store or retail partner as a walk-in customer. It's a gamble of course buy many people have had success with this method in the past.

Unfortunately for iPhone 7 Plus hopefuls, that option won't be on the table this year - at least, not at Apple retail stores.

Apple said the iPhone 7 Plus has completely sold out and thus, there won't be any available - in any color or capacity - for walk-in customers at Apple retail stores on launch day (tomorrow). There will be limited quantities of the standard iPhone 7 for walk-in customers at its stores although not in the new jet black color.

Those hoping to score an iPhone 7 Plus or a smaller iPhone 7 in jet black will instead need to try their luck elsewhere such as through their wireless provider or a retailer like Best Buy or Target. Even then, one has to think the odds are pretty slim. The only other option I can think of would be eBay or Craigslist although you'll certainly pay a premium to get what you want.