Marques Brownlee
Marques Brownlee3d ago
Tech

The Unreleased Rollable Smartphone!

10 min video5 key momentsWatch original
TL;DR

LG built a fully functional rollable smartphone that expands from 6.7 to 7.4 inches with a three-finger swipe, complete with working motors, custom animations, and back-display tricks—then died before shipping it.

Key Insights

1

Display curves around edgesThe rollable uses a hidden display that curves around the phone's right edge and wraps to the back, with clear glass on the rear so users can trigger selfies with the primary 64MP camera.

2

No room for buttonsLG engineered pressure-sensitive volume buttons at the top and mounted the power button on the back as a fingerprint reader to work around the lack of physical space on the sides.

3

Motors push 5 poundsThe motors are robust enough to push a 16-inch MacBook Pro across a table, and the phone can detect overpressure and auto-close to prevent damage.

4

Exposed gear teethWater and dust resistance were likely impossible—visible gear teeth, air gaps, and constant display exposure mean this would've been a durability nightmare compared to modern foldables.

5

LG got far enough to build custom animations, like a blooming-flower lock screen that responds to the expand gesture and Settings columns that slide in and out.

6

Larger curve radiusThe rollable still has a subtle crease because the display curves over a larger radius to the side—less dramatic than foldables but not eliminated.

Deep Dive

Why LG failed and what they left behind

Marques opens by diagnosing LG's death: they kept shipping experimental phones without a reliable cash cow to keep the lights on. The company was known for wild ideas—the LG Wing with its motorized T-shaped dual display, the G8X with its attachable second-screen case featuring a 180-degree hinge, the Mi Mix Alpha-style concept with wrap-around display. But between 2021 and their shutdown, rumors circulated about one final trick: a rollable phone that never materialized. Now in 2026, thanks to dbrand's mysterious sourcing, Marques has the only hands-on look at this ghost product. He immediately establishes the stakes: this is LG's most ambitious phone form factor yet.

How the rollable mechanism actually works

The basic pitch is simple: close it and you have a normal 6.7-inch phone; three-finger swipe and it rolls open to become a squatter 7.4-inch mini-tablet. The jump from 6.7 to 7.4 inches sounds modest on paper, but the aspect ratio shift is dramatic. Every time you roll it, speakers play a covering sound designed to mask the motor noise—an engineer's futile attempt to hide the mechanical whine, like coughing during an awkward moment. The real trick is storage: the extra screen hides in plain sight by curving over the phone's right edge behind a metal rail. Flip it over and you see the rest of the display wrapping to the back. LG went full commitment and used clear glass on the rear panel so you can see the curved display, and they even enabled software tricks to use it—messages, camera UI for selfies with the primary cameras.

The engineering constraints and button problem

With a curved, rollable design, there's no room for traditional buttons on the sides. LG solved this by making the volume controls pressure-sensitive areas at the top where buttons normally sit, and put the power button on the back where it doubles as the fingerprint reader under the cameras. It sounds awkward but Marques found it surprisingly reachable in practice. The real visual story is how far they got in the software experience. The lock screen animates like a blooming flower when expanded and collapses back to a single petal when closed. The Settings app slides over new columns when you open it and retracts them when you close. These aren't throwaway details—they signal LG was past prototype phase and thinking about how the form factor should actually feel.

The durability and practical tradeoffs

The motors are genuinely impressive, strong enough to push a 16-inch MacBook Pro across a table and sophisticated enough to auto-close if you squeeze the phone hard to prevent damage. But durability is a minefield. The visible gear teeth at the top and bottom, air gaps, and constantly exposed flexible display rule out any real water or dust resistance. Marques notes there's likely no IP rating because LG never got to market it. Compared to modern foldables where the screen is protected when closed, the rollable leaves the display perpetually exposed. There's still a subtle crease because the display curves over a larger radius to roll to the side—theoretically an advantage over foldables' tight-radius creases, but still not the zero-crease utopia the form factor promised. The 4,500mAh battery and 12GB RAM specs matter less than what Zack from JerryRigEverything uncovered: two motors and three spring-loaded arms orchestrating the entire opening sequence.

LG's legacy and what comes next

LG got insanely far in the development process—this is functional hardware with working software and special features, not a render or prototype. They just ran out of money before shipping. Marques credits LG as the only company bold enough to actually attempt something like this, though Samsung is reportedly still working on a rollable smartphone. Whether Samsung ships it this year or later, the unreleased LG rollable serves as proof that the idea works and that rolling, not folding, might be the next form factor battle. For now, this phone exists only in the hands of a few reviewers and in LG's corporate graveyard.

Takeaways

  • The rollable display is hidden by curving around the edge and back—LG even used clear glass on the rear to show it off and enable back-panel UI tricks.
  • Pressure-sensitive buttons and rear-mounted power solve the physical space problem, but water resistance and durability are unsolvable with an always-exposed flexible display.
  • The motors are strong enough to overcome resistance and auto-protect by detecting overpressure, showing LG thought deeply about real-world use.
  • Samsung is still pursuing rollables—stay subscribed for the first unboxing if they ship one, because LG proved the form factor is technically feasible.

Key moments

0:22The rollable reveal

With a simple three-finger swipe gesture across the whole thing, the whole phone expands and it rolls open to become a slightly more squarish 7.4-inch mini-tablet basically.

2:34Motor strength test

If you try to open this phone and give it a little resistance, it does actually push surprisingly hard against that resistance. So it can push a 16-inch MacBook Pro across a table with rubber feet down. That's like five pounds!

5:31Durability verdict

When it's open, I mean, look at these teeth. You can just tell. You can see the teeth of the gears at the top and the bottom. You can see air gaps. So between that and the fact that this soft, flexible display is constantly exposed to the elements, this was probably not going to have the best durability.

7:56Software polish confirmed

The Settings app, you can see this little slide-over animation when you go from closed to open to add a column to the Settings app. That's nice. And then when you go from open to closed, that subtle slide-over to take that column away. It honestly feels like they're really close to releasing this.

9:09LG's final verdict

What we do know is they got insanely far in the development process. This is functional hardware, working software, special features, all that stuff. They just didn't survive long enough to actually ship it.

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