Tecno Spark Slim: Ultra-Thin Phone with a Surprising Twist

At MWC 2025, Tecno showcased the Spark Slim, touted as one of the thinnest phones at 5.75mm. Despite initial skepticism about ultra-thin devices, the Spark Slim impressed with its 5,200 mAh silicon-carbon battery, which is larger than some full-thickness flagship models. Weighing 166g, it feels incredibly light and well-designed, though the buttons were criticized for being poorly responsive. The phone also features a unique LED-equipped camera bar reminiscent of the Nexus 6P. While it's currently just a concept, the Spark Slim demonstrates that ultra-thin phones can be both practical and appealing.