Tecno Unveils Concept for World’s Thinnest Smartphone at MWC 2025

The Tecno Spark Slim, measuring just 5.75mm thick, showcases impressive features but remains a concept device with no confirmed release date.

The Tecno Spark Slim, unveiled at Mobile World Congress 2025, is being promoted as the world's thinnest smartphone at 5.75mm thickness.
Despite its slim profile, the device includes a 5,200mAh battery, larger than many flagship smartphones, and supports 45W fast charging.
The concept phone features a 6.78-inch curved AMOLED display with a 144Hz refresh rate and up to 4,500 nits of peak brightness.
It includes a dual 50MP rear camera setup and a 13MP front camera, though its camera quality is not expected to rival Apple or Samsung devices.
Tecno has not announced a launch date for the Spark Slim, leaving its future availability uncertain as it remains a concept device.