• All four iPhone 15 models are tipped to switch from Lightning to USB-C connectivity.
• The iPhone 15 and iPhone 15 Plus are expected to run on an A16 Bionic chip while the new A17 Bionic will power the iPhone 15 Pro models.
• The iPhone 15 and iPhone 15 Plus should join the iPhone 15 Pro models in featuring a Dynamic Island cutout instead of a notch.
• The iPhone 15 is expected to adapt the 48MP main camera Apple added to last year's iPhone 14 Pro models.
• The iPhone 15 Pro will see more substantial changes such as a titanium frame and, in the case of the Pro Max, a periscope-style telephoto lens.

We should see the iPhone 15 arrive during the Apple event on September 12. So it's time to begin the countdown to seeing what new features Apple has in store.

The Phone 15 Pro figures to get the most substantial changes, from a new A17 Bionic processor to a stronger and lighter titanium frame. And the iPhone 15 Pro Max could get an exclusive periscope zoom lens. 

But don't sleep on the standard iPhone 15 even with the large expected iPhone 15 vs iPhone 15 Pro divide. The regular model is likely to pick up features introduced in last year's iPhone 14 Pro lineup such as the Dynamic Island cutout and main 48MP camera. And like all new iPhones, we're expecting the iPhone 15 to do away with the Lightning port in favor of USB-C.