Fix the iPhone Duo's shifting volume buttons with one setting, MacRumors guide explains

A small setting on the iPhone Duo can stop one of the foldable's more annoying quirks: volume buttons that seem to swap jobs when you turn the phone. MacRumors published a short guide on Saturday explaining where to find it.

Why the buttons feel inconsistent

Because the iPhone Duo opens and rotates between several postures, the way you hold it changes more often than on a conventional phone. According to MacRumors, that can leave the volume rocker feeling unpredictable, with a press that raised the volume one moment lowering it the next, and accidental changes as a result.

What the setting does

The option is called Fixed Position Volume Controls. When it is on, each volume button keeps the same function regardless of orientation. MacRumors says turning it off makes the buttons follow the screen instead: the button toward the top or right of the display raises the volume, and the one toward the bottom or left lowers it.

How to change it

The guide gives a three-step path: open the Settings app, tap Sounds & Haptics, then switch off Fixed Position Volume Controls. The behavior is specific to the iPhone Duo, and the guide does not name an iOS version for it.

There is one caveat. If Orientation Lock is enabled, MacRumors notes that the buttons follow the locked orientation rather than the way the phone is physically held. Anyone who prefers each button to keep its function in every posture can simply turn the setting back on.

A note on defaults

MacRumors reports that Apple's documentation suggests the screen-following behavior is meant to be the default. The site says that was not the case on the few review units it tested, so it is unclear whether the setting ships in the same state on every device.

The tip is one of several early usability findings to emerge since the iPhone Duo reached stores on Friday, alongside guides on unlocking the phone with an Apple Watch and the Touch ID behavior reviewers have discussed. Apple has not commented publicly on the volume-button default, and settings may change in later iOS updates.