I'm not a fan of slim devices but the Tecno Spark Slim is a concept phone that I want to launch soon, given the no-compromise form.The Latest Tech News, Delivered to Your Inbox

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.

Following its Unpacked unveiling in January, the company showcased the slimmed-down Galaxy S25 model in Barcelona.

There have been several rumours surrounding an iPhone 17 Air over the last couple of months, Oppo announced the world's thinnest folding phone in its Find N5, and Samsung teased the S25 Edge during the launch of its current flagships.

Samsung has been teasing its super-thin Galaxy S25 Edge since CES in January, and now the company brought a bunch of actual devices to Mobile World Congress (MWC) in Barcelona. There was a catch, though: I wasn't allowed to touch them.

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Thinner than the rumored thickness of the Galaxy S25 Edge, the Tecno Spark Slim is a concept phone that's beaten Apple and Samsung to the punch.

I went hands-on with the world's thinnest phone at MWC 2025, and it was amazing. Tecno's Spark Slim is just 5.75mm thick, but it somehow has a 5200mAh battery.