Apple has confirmed that the iPhone Duo will ship with iOS 27.1 when it launches in October, suggesting the update will arrive shortly before the device's release. The iPhone Duo is available starting October 23, so iOS 27.1 is expected to roll out just prior. This timing marks an earlier release than last year's iOS 26.1, which arrived on November 3, indicating a shift in Apple's update schedule.

The iOS 27.1 update will include redesigned app layouts optimized for the iPhone Duo's dual displays and a new vertical dock. Meanwhile, the iPhone 18 Pro models will launch with iOS 27 on September 18, with the software debuting on September 14. Apple will begin accepting pre-orders for the iPhone Duo on October 16, a week before its official launch.