Samsung took a unique approach this year by introducing the slim Galaxy S25 Edge four months after the Galaxy S25 series launch. However, this "remarkable feat of engineering" might not be as innovative as it appears.

Samsung's press release for the Galaxy S25 Edge is filled with typical marketing flair, describing it as a "revolutionary" and "category-defining slim smartphone" that "reimagines nearly every element of smartphone design." While the phone does look impressive, the concept isn't entirely new.

Related ##### The Super-Thin Galaxy S25 Edge Has Arrived

Samsung has officially unveiled its ultra-thin flagship for 2025, the Galaxy S25 Edge. It's available for pre-order starting today, but achieving this slim design required some compromises.

Let's take a trip back to 2016, a year marked by the passing of David Bowie, the Pokémon Go craze, the Cubs' World Series victory, and an unfortunate incident involving a gorilla. Following the Rio Olympics, Motorola released the Moto Z.

This phone stood out for several reasons, including the introduction of the "Moto Mods" modular accessory system. These mods included larger speakers, battery packs, pico projectors, and decorative shells, which attached to the phone's back using magnets and pogo pin connectors.

Adding an accessory increases the phone's thickness, so the Moto Z itself was designed to be just 5.2mm thick without any mods. This measurement excludes the camera bump, which is standard practice. It was quite an achievement for its time and remains impressive today.

Thin Phones of 2025

To summarize, the Moto Z, launched in 2016, was 5.2mm thick. Smartphone historian Michael Fisher reminds us that this wasn't a dream, though it seems many have forgotten.

Samsung's 5.8mm Galaxy S25 Edge doesn't push any real boundaries and, at $1099, seems poised to steal sales from the more interesting Galaxy Flip. Given Motorola's release of a 5.2mm phone 9 years ago, it's tough to get excited about life on this particular "edge." ?: www.instagram.com/p/DJkqeMGRVHl/— Michael Fisher (@captain2phones.bsky.social) 2025-05-13T00:14:43.249Z

The Galaxy S25 Edge measures 5.8mm at its thinnest point. Including the camera bump, it's roughly the same thickness as the standard Galaxy S25, minus its camera bump. But since camera bumps are typically not included in thickness measurements, this isn't a concern.

In researching this article, a Google search for "world's thinnest phone" returned results featuring the 5.8mm Samsung Galaxy S25 Edge and the 5.75mm Tecno Spark Slim. Neither is thinner than the 5.2mm Moto Z.

Finding the true "world's thinnest phone" is challenging, but the Vivo X5 Max from 2014, at a mere 4.8mm thick with a minimal camera bump, might hold that title. Its 2300 mAh battery was small, but it's still an impressive engineering achievement.

What Samsung Got Right

The "super slim" phones of 2025 may not outdo their predecessors in thinness, but that's not necessarily a drawback. Samsung has made significant strides where Motorola couldn't.

The Galaxy S25 Edge and Moto Z have similar footprints, but the Edge boasts a larger 6.7-inch display compared to the Moto Z's 5.5 inches. The battery is another critical aspect of slim phones, and the Edge, at just 0.6mm thicker, offers a 3900mAh battery, 1300mAh more than the Moto Z's.

This alone justifies not being the world's thinnest smartphone—a claim Samsung isn't making. A phone that looks cool but can't last a day is impractical. The 3900mAh battery is slightly smaller than the standard Galaxy S25's 4000mAh but still reasonable.

Nine years of technological advancement have brought numerous improvements. The Edge's secondary camera rivals the Moto Z's primary camera, and it has three times the RAM, eight times the storage, and faster charging.

##### Samsung Galaxy S25 Edge

Samsung's latest flagship phone combines cutting-edge technology with a slim design. Pre-order the Galaxy S25 Edge from Samsung and receive $50 in credit along with a free upgrade to the 512GB model.

$1100 at Samsung$1100 at AT&T$1100 at T-Mobile$1100 at Verizon ---

Ultimately, Samsung is doing what all companies do: promoting a new product. Is the Galaxy S25 Edge a "remarkable feat of engineering that reimagines nearly every element of smartphone design"? Not exactly. But is it an attractive phone with fewer compromises than its even thinner predecessors? Absolutely. The Moto Z series gradually increased in thickness, reaching 7.4mm by 2019. It will be interesting to see the future direction of the Galaxy S25 Edge.

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