Amid rumors about a thinner iPhone, Tecno has unveiled a phone concept, called the Spark Slim, that's skinnier than a pencil. I got to hold it at Mobile World Congress in Barcelona, and it's certainly the lightest and thinnest phone I've ever encountered (the company says it's just 146 grams).

Tecno showcased its slim smartphone concept, the Spark Slim, at MWC 2025. If this makes into production, it will be rivalling against the likes of the Galaxy S25 Edge and iPhone 17 Air.

The Tecno Spark Slim is an ultra-thin, high-end Android phone that looks a lot like the rumored iPhone 17 Air - here's what it has to offer.

Ahead of MWC, Tecno teased the Spark Slim as the “industry’s slimmest phone.” The 5.75mm device won’t break records, as the mostly-forgotten Moto Z was much thinner at just 5.2mm, but it does something that the Moto Z,

The Tecno Spark Slim lives up to its name, measuring 5.75mm thin. What impressed me during my brief hands-on time with the Spark Slim wasn't only the thinness. It's how great it f