The newest iPhones are top-to-bottom better phones with lots of enhancements; iPhone 6 owners don't need the upgrade, but everyone else should seriously consider it.
iPhone and iOS news
Need to protect your iPhone 6/6S or iPhone 6 Plus/6S Plus? A slew of cases are available, with new cases arriving weekly. Here are our current top picks.
AT&T customers with the new iPhone 6S and 6S Plus, as well as last year's iPhone 6 and 6 Plus, can now make calls over Wi-Fi.
Explore the features on your shiny new iPhone with CNET's 6S and 6S Plus How To guides.
From London we see how the new iPhone 6S Plus shapes up against the Samsung Galaxy S6 and iPhone 6 in outdoor, low-light and selfie camera tests.
Addressing questions about the different processors used in the new iPhones, Apple says the battery life of its devices varies by only 2 percent to 3 percent.
The new iPhone 6S Plus looks nearly identical to last year's model but features all-new hardware on the inside.
Are you a bit of a shutterbug? Add that to the list of reasons to avoid the 16GB model of the latest iPhone.
Not all new iPhones have the same processor chip, but Apple says differences in performance are minimal. Apple also pulls ad-blocking apps over privacy concerns, and Netflix raises its price again.
The iPhone's share of the US smartphone market dropped in advance of the new lineup, says Kantar WorldPanel ComTech, but it will certainly bounce back as the new phones gain traction.