The smartphone market in 2025 is seeing a strong push towards thinner and sleeker designs, with several manufacturers releasing or rumored to be releasing incredibly slim devices. But which phone is really the thinnest?
Several smartphone companies have started claiming to have produced the thinnest devices. In this article, we take a careful look at the major and minor ones. Judge for yourself which is the slimmest smartphone in 2025.
Here's a list of some of the thinnest smartphones anticipated or released in 2025:
Ultra-Thin Standout smartphones as of September 2025
TECNO Spark Slim: This concept phone has garnered significant attention for its astonishing 5.75 mm thickness, making it one of the thinnest devices on record. Despite its slim profile, it manages to pack a substantial 5200mAh battery.
Samsung Galaxy S25 Edge: Samsung's contender for the thinnest smartphone, the Galaxy S25 Edge, boasts a 5.8 mm titanium body. It features a 6.7-inch AMOLED display, a 200MP camera, and the Snapdragon 8 Elite chipset. However, to achieve this thinness, it comes with a smaller 3900mAh battery.
Apple iPhone 17 Air (Rumored): Leaks suggest Apple could release its thinnest iPhone ever, potentially around 5.5 mm. This rumored device is expected to feature a 6.6″ OLED display and the A19 chip, with a focus on a lightweight and minimalist design.
Thinnest Foldable smartphones out there...
The foldable segment is also contributing to the trend of slim devices, particularly when unfolded:
Oppo Find N5: Claimed to be the world's thinnest book-style foldable, it measures a mere 4.21 mm when unfolded.
Honor Magic V3: Following the previous closely, this foldable offers an impressive unfolded thickness of 4.4 mm.
Xiaomi Mix Fold 4: This is another contender in the slim foldable space, measuring 4.6 mm when unfolded.
Here Are Other Notable Slim Smartphones in 2025
Several other devices are notable for their slim profiles and impressive features, although we can't say that they broke the record. Take a brief look at them below.
Infinix HOT 60 Pro+: Features a 5.95 mm slim profile and weighs just 155g, while still housing a 5160mAh battery.
Samsung Galaxy S25: While not as extreme as the S25 Edge, the standard Galaxy S25 is noted for its compact and lightweight design, measuring 7.2 mm thick and weighing 162 grams.
Google Pixel 9 Pro: Offers a balanced approach with a 6.3-inch display and a focus on camera technology, with a slim profile that remains pocketable.
Motorola Razr 60 Ultra: This compact foldable is praised for its excellent performance and battery life within a super-compact body.
It's worth noting that achieving such thinness often involves compromises in areas like battery capacity or the inclusion of certain camera components, such as telephoto lenses. However, the engineering innovations in 2025 are clearly pushing the boundaries of what's possible in smartphone design.
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