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).

At MWC 2025, Tecno unveiled its Spark Slim smartphone. While the company calls it a concept device (read: prototype), it is reportedly preparing for a "staggered launch" later this year. Regardless, after brief hands-on time with the phone, I can confidently say this is how thin phones should be done.

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.

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