TECNO PHANTOM Ultimate G Fold Concept: World’s Thinnest Tri-Fold with Pioneering Dual Inward-Folding Design

Marco Lancaster

July 18, 2025

Foldable phones have come a long way, but TECNO’s new concept is aiming even higher. The PHANTOM Ultimate G Fold Concept is not just another folding phone. It’s a tri-fold, dual-inward folding device that unfolds into a massive 9.94-inch display while staying thinner than anything else in its category.

It folds down to just 11.49mm, which is already slimmer than most dual-fold phones. Unfold it, and you’re looking at a sleek 3.49mm profile. On paper, that makes it the thinnest tri-fold phone we’ve seen so far.

TECNO’s New Tri-Fold Concept Might Be the Most Ambitious Foldable Yet

What makes this concept interesting is its G-style fold. Instead of folding outward and leaving the screen exposed, it folds inward from both sides. This keeps the flexible display protected when the phone is closed. That might not sound like a big deal, but anyone who has used a foldable knows how fragile those screens can be.

TECNO created a custom dual-hinge setup to pull this off. A smaller waterdrop hinge handles one side, creating a tight fold without a gap. The larger hinge folds the other part over the top. Once closed, everything locks into place, keeping the phone slim and secure.

This design isn’t just about protection. It also supports multiple use modes. You can partially fold the device and use it in a hovering position, which is useful for things like video calls, watching content, or running dual apps side by side.

Big Screen, Small Compromises

Once fully opened, the phone gives you a nearly 10-inch display with minimal visible creasing. That turns the phone into a proper mini-tablet, great for multitasking, media consumption, or even mobile work. It’s the kind of screen real estate that justifies a foldable format.

TECNO also claims this device packs a powerful processor, a triple camera setup, and a large battery of over 5000mAh. Those specs sound ambitious for something this thin, but they make the concept far more exciting. It’s not just about showing off a cool fold. It’s aiming to deliver a flagship experience in a form factor that still fits in your pocket.

The company also used advanced materials to get the weight and thickness down. The back cover uses Titan Fiber that’s only 0.3mm thick, and the hinge relies on high-strength steel. These choices suggest TECNO wants this to be more than just a fragile prototype.

Read Also: Android Gets Better Multitasking with New 90/10 Split-Screen Option

A Step Beyond Last Year’s Prototype

This isn’t TECNO’s first shot at a tri-fold concept. In 2024, they introduced the PHANTOM Ultimate 2 at MWC, and it caught a lot of attention. The new model looks like a clear evolution, refining the design while pushing even harder on thinness and functionality.

We don’t know yet if this phone will ever hit stores, but TECNO says it will be shown again at MWC 2026. That could be a sign they’re serious about moving from concept to reality.

The Bottom Line

The PHANTOM Ultimate G Fold Concept might not be ready for store shelves just yet, but it shows where foldables could be heading. With a compact design, smart engineering, and a focus on real usability, TECNO is putting pressure on bigger brands to innovate or fall behind.

If TECNO can turn this concept into something people can buy, it could be one of the most exciting foldables in years.

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