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Apple iPhone Duo reviews are in: Plenty of criticism, but positive hinge stress test

The Apple iPhone Duo fails to fully impress in tests.
ⓘ Apple
The Apple iPhone Duo fails to fully impress in tests.
The first reviews of the Apple iPhone Duo are in, showing how the foldable smartphone withstands over 32,000 folds. The matte nano-texture display receives plenty of praise. However, there is criticism of the heavy chassis, which can get very hot, and the mediocre cameras.

The Apple iPhone Duo will officially start shipping on Friday. The tech press has already had a week to test the foldable flagship smartphone. The iPhone Duo failed to fully impress, even though Apple is taking promising approaches in many areas. Joanna Stern praises the matte nano-texture main display, which offers significantly better readability in sunlight than the Samsung Galaxy Z Fold8 ($1,699 on Amazon).

The crease in the middle of the display is also nowhere near as visible as on Samsung's device, but it is by no means invisible, as Apple's marketing makes it seem. The under-display camera does not deliver good image quality, and particularly in backlit conditions or low light, it is advisable to fold the smartphone shut and use the punch-hole front camera instead. Several reviews also criticize the lack of a telephoto camera and the merely mediocre dual-camera setup.
 


The iPhone Duo gets very hot under sustained load, such as when the camera is used for extended periods or when gaming. The volume buttons on the top are reportedly difficult to reach, particularly during a phone call, while the Touch ID fingerprint sensor in the lock button does not always work reliably. At the moment, unoptimized third-party apps still cause problems, for example when they are displayed as a small window with black bars or rotated by 90 degrees, though many of these issues will likely be fixed through updates.

Joanna Stern used a small machine to fold and unfold the iPhone Duo more than 32,000 times, which caused no problems whatsoever – although, according to a measuring device, the hinge offers slightly more resistance than before this test. All in all, while most reviews describe the iPhone Duo as a solid foldable with excellent build quality, Apple's first-generation foldable phone is not entirely free of problems, as the reviews from 9to5Mac, The Verge, PetaPixel and Marques Brownlee are showing.
 

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> Expert reviews and news on laptops, smartphones and tech innovations > News > News Archive > Newsarchive 2026 10 > Apple iPhone Duo reviews are in: Plenty of criticism, but positive hinge stress test
Hannes Brecher, 2026-10-21 (Update: 2026-10-21)