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| The more compact Samsung Galaxy Z Fold 8 appears to have a display advantage over the larger Ultra model. |
A new leak suggests Samsung is quietly testing a game-changing display technology on its upcoming wider foldable—one that could finally kill the dreaded crease for good, while the more expensive Ultra model sticks with older, thinner glass.
If you’ve been following the foldable smartphone race, you already know that Samsung’s Galaxy Z Fold series has long been criticized for one persistent flaw: the visible crease running down the middle of its inner display. Every generation has promised improvements, but the crease remains a compromise. Now, a fascinating twist emerges from a recent report by ZDNet Korea—and it turns everything we thought about Samsung’s 2026 lineup on its head.
According to the report, the larger, presumably more expensive Galaxy Z Fold 8 Ultra (which retains the classic tall, narrow cover-display form factor) will actually be less impressive in one crucial area than its sibling: the more compact, wider device currently referred to as the Galaxy Z Wide Fold, Galaxy Z Fold 8 Wide, or simply the “Wide Fold.”
The difference? Ultrathin glass (UTG) thickness. And the numbers tell a compelling story.
30% Thicker Glass: The Crease Killer Samsung Has Been Waiting For?
Industry sources cited by ZDNet Korea reveal that Samsung plans to equip the wider foldable with UTG measuring 60 micrometers in thickness. That might not sound like much, but it represents a 30% increase compared to the 45-micrometer glass expected to ship inside the Galaxy Z Fold 8 Ultra.
Why does thickness matter? In the world of foldable displays, thicker UTG offers two major advantages:
- Reduced creasing – A stiffer glass layer helps keep the flexible AMOLED panel flatter when unfolded, making the central crease far less noticeable to the eye and touch.
- Better drop protection – Thicker glass is inherently more resistant to impact damage, addressing one of the biggest durability concerns for foldable owners.
However, there’s a trade-off. Thicker glass also increases the risk of fracture when folding, because the material is under greater stress at the hinge point. That’s why Samsung has been moving cautiously—until now.
A Brief History of Samsung’s UTG Evolution
To understand why this leak is so significant, let’s look back. The Galaxy Z Fold 6 (2024) used UTG just 30 micrometers thick. Then came the Special Edition Fold (released only in Korea and China), which jumped to 45 micrometers—the same thickness found in last year’s Galaxy Z Fold 7.
That means the Galaxy Z Fold 8 Ultra, with its 45‑μm glass, will see no improvement in UTG thickness compared to the Fold 7. It’s essentially carrying over the same display engineering while the Wide Fold pushes forward.
As the report notes, “the glass thickness of the Galaxy Z Fold 6 from 2024 was 30 micrometers; on the thinner Special Edition … it was increased to 45 micrometers—the same value as on the Galaxy Z Fold 7. This means that the Galaxy Z Fold 8 Ultra will likely see little change in this respect compared to its predecessor.”
In other words, if you buy the premium Ultra model expecting the best possible crease reduction, you may be disappointed.
Why Is Samsung Doing This? Enter Apple and the “Test Case” Theory
The strategic reasoning becomes clearer when you consider competition. The wider, more compact foldable is reportedly designed to directly compete with Apple’s rumored iPhone Ultra—a device expected to feature a nearly crease‑free foldable display. Samsung knows that Apple won’t launch a foldable with a visible seam, so the pressure is on.
By giving the Galaxy Z Wide Fold significantly thicker UTG, Samsung is effectively beta‑testing the 60‑μm solution in a real‑world product before committing to it across the entire lineup. If the thicker glass proves reliable—surviving hundreds of thousands of folds without cracking—then the Galaxy Z Fold 9 in 2027 will likely adopt the same 60‑micrometer UTG component across all models.
As the original analysis puts it: “Hence, the Galaxy Z Wide Fold is essentially a test case for the next generation of Samsung foldables.”
The Risk That Could Pay Off Big
Samsung is walking a tightrope. A thicker UTG layer that works flawlessly in the Wide Fold would be a massive win, eliminating the crease complaint that has dogged the Z Fold series since its inception. But if the glass starts cracking at the hinge—especially in cold weather or after repeated folding—it could lead to a costly recall and reputational damage.
The company appears willing to take that risk on a single model rather than jeopardize its entire flagship line. The Ultra, by contrast, plays it safe with the known 45‑μm glass, offering a taller display and likely better multitasking but without the crease‑free bragging rights.
What This Means for Buyers
If you value a seamless, notebook‑like inner screen and don’t mind a slightly wider, more phone‑like aspect ratio when folded, the Galaxy Z Fold 8 Wide could be the foldable you’ve been waiting for. It promises the most advanced UTG Samsung has ever mass‑produced, and if early reviews confirm the crease is truly “barely visible,” it might finally convert skeptics.
On the other hand, if you prefer the traditional tall cover screen (similar to a remote control) and want the absolute best cameras or processor—details still unclear—the Galaxy Z Fold 8 Ultra remains an option, albeit one with older display tech.
For the full technical breakdown and original Korean-language sourcing, check out the ZDNet Korea report here.
The Bottom Line
Samsung appears to be making a bold, calculated bet. By reserving the thicker 60‑μm UTG for a single “Wide” model, the company can gather real‑world durability data while simultaneously offering a compelling alternative to Apple’s upcoming foldable. If successful, 2027’s Galaxy Z Fold 9 will likely make 60‑μm glass the standard, finally delivering the crease‑free foldable users have demanded for years.
Until then, the Galaxy Z Fold 8 series is shaping up to be one of the most intriguing lineups in Samsung’s history—not because of what the Ultra does, but because of what the Wide Fold dares to try.
Stay tuned for more updates as we approach Samsung’s official Unpacked event later this year.