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).

We got our hands on the world's slimmest phone by Tecno and their new triple foldable phones that were displayed at MWC 2025.

TECNO teased what users can expect from its MWC 2025 presence, like its latest "advancements" in skin tone recognition for its mobile imaging software. The Chinese OEM also highlighted its work to develop "practical AI," as well as a stating a prototype of its tri-fold, the Phantom Ultimate 2, could be at the event.

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

TECNO unveils SPARK Slim at MWC 2025: ultra-thin design, 5200mAh battery, 50MP+50MP dual rear cameras, 6.78-inch AMOLED display.

With Apple and Samsung as the main rivals in the race, smartphone manufacturers have initiated a new trend of releasing powerful, thin phones. As we were discussing the Samsung Galaxy S25 Edge and Apple's iPhone 17 Air,

TECNO has a tri-fold concept smartphone on display at MWC 2025. The company has it at its booth, over at Booth 6B11, Hall 6, Fira Gran Via. You can also see various other products