Apple's upcoming foldable smartphone, the iPhone Duo, will launch with iOS 27.1, a version specifically tailored for its form factor. However, early units may require a software update during the initial setup process to ensure optimal performance.

Reports indicate a discrepancy between the pre-installed software and the latest available build. While initial units are shipped with build 24A94232, Apple has recently released a newer version, 24A94425. The company has not yet released official notes detailing the specific fixes or changes included in this newer build.

Industry observers suggest that the update might address software issues identified during the media testing phase, though this remains unconfirmed by Apple. As the official release date approaches, further software iterations are possible before the device reaches consumers.

The iPhone Duo is scheduled for an official market release on October 23, with pre-orders opening on October 16. Given the time remaining until the launch, the final software version installed on devices at the point of sale may differ from current builds.