Samsung has launched its first dual-hinged smartphone. The Galaxy Z TriFold challenges conventional design with its extreme thinness. The device was unveiled in Seoul this week.This move signals a major shift in the foldable phone market. Samsung is pushing engineering limits to create a new form factor. According to Reuters, the focus on thinness is a direct response to evolving user preferences for sleeker devices.
Measuring the World’s Thinnest Foldable Phone
The Galaxy Z TriFold’s profile is not a single number. It folds not once, but twice. When fully unfolded, it measures just 3.9mm at its thinnest point.That measurement comes from the left-most panel. The center panel is slightly thicker at 4.2mm. The right-side panel measures 4.0mm.This tapering design is highly unusual for a smartphone. When folded, the device is 12.9mm thick. Samsung notes a minimal gap remains between the panels.The company states this design was necessary for the complex hinge mechanism. It allows the screen to fold smoothly without damage. Most users will likely not notice the tiny variation in daily use.

A Camera Bump Thicker Than the Phone Itself
The pursuit of thinness has created a unique visual result. The camera housing protrudes significantly from the rear. In fact, the housing is thicker than the phone’s own body.Samsung has not released the exact measurement including the camera bump. Images clearly show the prominent housing containing a 200MP main sensor. This creates a striking silhouette.This design quirk highlights a key industry challenge. Camera technology demands certain physical space for lenses and sensors. Phone bodies can now be made thinner than the essential components they must house.Analysts suggest this may remain a niche feature for complex foldables. Mainstream slab smartphones will likely prioritize battery life and camera performance over extreme thinness. For Samsung, the TriFold is a bold statement of technical capability.
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The Samsung Galaxy Z TriFold proves that innovation in smartphone form factors is far from over. Its revolutionary thinness sets a new benchmark, even if it creates a unique design trade-off with its camera housing.
Thought you’d like to know
How thick is the Samsung Galaxy Z TriFold when folded?
The phone is 12.9mm thick when fully folded. This includes a small intentional gap between its three panels. It is noticeably slimmer than many traditional smartphones in this state.
What is the thinnest part of the Galaxy Z TriFold?
The thinnest part is the left panel when fully open, measuring just 3.9mm. The other panels are 4.2mm and 4.0mm thick. This makes it one of the thinnest mobile devices ever produced.
Why is the camera housing so thick on the TriFold?
The camera module requires specific space for advanced sensors and lenses. The phone’s body is now so thin that the essential camera hardware naturally protrudes. This is a direct result of the pursuit of minimal device thickness.
Does the thin design affect battery life?
Samsung has not released full battery specifications yet. Engineering such a thin device often involves compromises with battery size. The final performance will be clear once independent reviews are published.
Is the Samsung Galaxy Z TriFold available worldwide?
The initial launch is in key markets including South Korea, the United States, and parts of Europe. A broader global rollout is expected in the coming months. Availability will depend on regional regulatory approvals.
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