Apple has released a new iOS 27.1 build (24A94425) for the upcoming iPhone Duo, just days before its official launch on October 23. The update replaces build 24A94232, which comes preinstalled on the company’s first foldable iPhone, meaning early buyers will likely have a software update waiting during setup.
The new build arrived on October 12, ahead of iPhone Duo pre-orders opening on October 16. Apple hasn’t published a detailed changelog, although the revised build likely addresses bugs and improves software stability before the device reaches customers.
What’s New in iOS 27.1 for iPhone Duo?
iOS 27.1 introduces software features designed specifically for the iPhone Duo’s foldable display, allowing users to switch between different screen configurations and multitasking layouts.
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As previously covered in our iPhone Duo software feature breakdown, the update includes several foldable-specific capabilities:
- Split View: Run two supported apps side by side on the 7.6-inch inner display.
- Adaptive layouts: Apps adjust their interfaces when users open, close, or reposition the device.
- Improved StandBy: An updated StandBy experience supports the Duo’s different folding positions.
- Redesigned Dynamic Island: Apple has adapted Dynamic Island for the foldable interface.
- Call Context: A new widget provides additional information during incoming calls.
These features are part of the iPhone Duo’s software experience and haven’t been identified as changes introduced specifically in build 24A94425.
iOS 27.1 Release Details
| Detail | Information |
|---|---|
| Software version | iOS 27.1 |
| New build number | 24A94425 |
| Preinstalled build | 24A94232 |
| Supported device | iPhone Duo |
| Build release date | October 12, 2026 |
| iPhone Duo launch | October 23, 2026 |
How to Update iPhone Duo to iOS 27.1
Once the iPhone Duo becomes available, users can check for the latest software using these steps:
- Open Settings on your iPhone Duo.
- Select General.
- Tap Software Update.
- If a newer build appears, select Update Now and follow the instructions.
Apple could release another build before launch, so the exact update available on October 23 remains subject to change.
Meanwhile, iOS 27.1 remains exclusive to the foldable model, while other supported iPhones follow the iOS 27.2 update cycle. You can read more about why Apple reserved iOS 27.1 for the iPhone Duo.
Apple opens iPhone Duo pre-orders on October 16, with deliveries beginning October 23. If you’re planning to buy one, let us know what you think about Apple’s first foldable iPhone in the comments.
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