Just Got the iPhone Duo? 5 Editor-Approved Settings to Unlock Hidden Foldable Details

If you just got your hands on the iPhone Duo, your first instinct is probably to open and close it over and over again. But before rushing to download apps or snap photos for your Instagram Stories, taking a few minutes to adjust your system settings will make everyday use much smoother. Featuring a 5.4-inch outer screen when folded and a 7.6-inch main display when opened, this foldable handles very differently from traditional slab iPhones. Here are five must-do settings to help you get the most out of your folding screen.

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1. Register Touch ID at multiple angles for smooth unlocking

When setting up your new device, you will notice fingerprint authentication is built right into the side power button. Since foldables alternate between one-handed use when closed and two-handed use when opened, you shouldn’t just register your right thumb.

You can add multiple fingerprints in Settings > Touch ID:

• Both thumbs: Perfect for pressing the button naturally while holding the 5.4-inch outer display with one hand.
• Both index fingers: When unfolded to 7.6 inches and cradled in both hands, your index fingers fall naturally right onto the power key.

Remember to turn on Apple Watch unlock as well. That way, whether you are replying to messages one-handed on your commute or watching shows at your desk, unlocking stays completely smooth.

2. Enable Left Edge Offset if you use a case

Most people put a protective case on their new phone right away. However, because of the hinge cover and frame on foldable cases, text along the left side of the outer screen or back-swipe gestures can sometimes get blocked by the edge of the case.

There is actually a helpful toggle hidden in the system: go to Settings > Display & Brightness and turn on Left Edge Offset. Once active, the display area and touch targets on the left side of the outer screen shift slightly inward to avoid the case’s thickness, so your swipes and taps will not get snagged.

3. Cord-free StandBy mode for your desk

On standard iPhones, StandBy mode usually requires the phone to be plugged into a charger. On the iPhone Duo, simply prop the phone up half-folded like a tiny tent or open book on your desk, and StandBy activates automatically without a charging cable.

You can set it up with a minimalist clock, live weather reports, or a rotating photo memory album. By day, it acts as a modern desk clock beside your workstation, showing delivery updates and Live Activities at a glance. By night, place it on your nightstand to use the gentle sunrise alarm that wakes you up with gradually brightening light.

4. Dual-screen preview and Smart Take

One of the biggest conveniences of a foldable is never having to rely on strangers to guess your photo angle. When taking pictures of friends, the outer 5.4-inch screen displays the camera view in real time so they can check their hair and expression; if you want to use the 48MP main camera for selfies, you can use the cover screen to check your composition.

If you are traveling solo, you can turn on the Smart Take mode and set the half-folded phone on a cafe table. The built-in model detects when you are posed and snaps the photo automatically, saving you from the hassle of setting a timer over and over.

5. Pair up your most-used apps with Split View

Using the unfolded 7.6-inch Super Retina XDR display for just one app at a time feels a bit like a waste. iOS offers a Split View function, so set up your most-used combinations on day one: pair Calendar with Mail or Notes during work, or open Safari to compare prices on one side while running your messaging app to chat with friends on the other!

Setup is highly intuitive: drag two apps side by side in the multitasking interface, then press and hold the center divider to link them. Opening either app later automatically launches both in split-screen, making the phone operate just as sharply as a mini tablet.

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