iPhone Duo’s Specs Page: Four Details Apple Added Since the September 9 Keynote

Apple iPhone Duo colors
Image: Apple

Apple has not changed iPhone Duo’s price, colors or October dates since the September 9 keynote. But four details on Apple’s own live pages were never part of the announcement itself, and none of them appear in the coverage written the day of the event. They surface only in the tech specs page’s footnotes, or on Apple’s developer site.

Apple iPhone Duo display sizes
Apple's specs page footnotes the exact diagonal size of both displays measured as a standard rectangle. Image: Apple

Reading Apple’s iPhone Duo pages today against what Apple said on stage and in its September 9 press release turns up the following four additions.

Key facts

ItemDetail
Pre-orderFriday, October 16, 5 a.m. PT
AvailabilityFriday, October 23, in more than 70 countries and regions
Starting price$1,999 for 256GB, unchanged since the keynote
Newly visible since September 9Crash Detection, a full cellular band list, a display-measurement footnote, a developer hub
Apple iPhone Duo colors
Price, colors and the October dates have not moved since the September 9 keynote. Image: Apple

Crash Detection quietly joins the feature list

Apple’s tech specs page carries a numbered footnote stating that “iPhone Duo, iPhone 18 Pro, iPhone 17e, iPhone 17, iPhone Air can detect severe car crashes and call for help,” and that the feature requires a cellular connection, satellite connectivity or Wi-Fi calling. Neither the keynote nor Apple’s press release named Crash Detection for its foldable. It shows up only in the specs page’s fine print, alongside the same footnote Apple runs on iPhone 18 Pro’s own specs page, which lists the identical five-model roster below.

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ModelCrash Detection footnote
iPhone DuoListed
iPhone 18 ProListed
iPhone 17eListed
iPhone 17Listed
iPhone AirListed
Apple iPhone Duo Folio navy blue
Apple's accessory pricing and the rest of the specs page have stayed fixed since launch day. Image: Apple

The band list fills in exactly which networks apply

Apple’s September 9 materials described iPhone Duo’s modem as “5G sub-6 GHz and mmWave” without listing a single band number. The live specs page now names model A3447 directly and lists the FDD and TDD 5G NR bands, the LTE bands, and three mmWave bands (n258, n260 and n261) that match the mmWave support Apple already ships on its US iPhones. None of that granularity was published on launch day; it exists now because the specs page, not the keynote, is where Apple always puts it.

A rounded-corner footnote resizes both displays, on paper

Apple’s marketing language calls the two displays 7.6-inch and 5.4-inch. A footnote added to the specs page explains why those numbers are a little generous: “The iPhone Duo displays have rounded corners that follow a beautiful curved design, and these corners are within a standard rectangle. When measured as a standard rectangular shape, the screens are 7.58 and 5.36 inches diagonally (actual viewable area is less).” Apple uses this exact disclosure pattern on every iPhone, but the 7.58- and 5.36-inch figures themselves are new information, not something the keynote or the press release stated.

Apple opened a developer hub the same day

On September 9, Apple’s developer site also published a “Get Ready for iPhone Duo” hub, with six technical videos and a design guide already live and more tools promised for later in the month. That page sits on developer.apple.com rather than in the consumer press kit, which is why it did not turn up in the research written immediately after the event recap went live.

What Apple has not said

  • No change to iPhone Duo’s price, colors or ship date since the keynote.
  • No update to the country list beyond the more than 70 named for October 23 and 28 more for October 30.
  • No specific date within September for the developer tools still marked “coming later this month.”
  • No new figures for hinge cycles, crease depth or battery capacity beyond what the press release already gave.

Five weeks out from an October 23 launch, the specs page is still the most current source on iPhone Duo, more current than the keynote that introduced it. Check Apple’s iPhone Duo overview and how it compares to iPhone 18 Pro Max again closer to October 16, when pre-orders open and the page is likeliest to change next.