Tecno to showcase World’s Sleekest Phone with large Battery During MWC 2025

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TL;DR
  • Tecno is all set to showcase the world’s sleekest foldable, naming it as Tecno SPARKS Slim.
  • The concept will be shown off during upcoming MWC 2025.
  • It will measure 5.75mm and pack a large 5200mAh+ battery.

MWC is set to commence on March 3rd, with major technology companies preparing to unveil their latest innovations at the event. Tecno has revealed plans to present the Tecno SPARKS Concept, which is touted as the world’s thinnest phone, featuring an impressive 5200mAh+ battery during MWC 2025.

This year, it appears that leading smartphone manufacturers are competing to create the thinnest devices. The Oppo Find N5 has recently been highlighted as the sleekest foldable phone to date, while Samsung is poised to introduce the Galaxy S25 Edge, known for its ultra-slim design. Additionally, Apple is preparing to launch the slimmest iPhone, referred to as the iPhone 17 Air, in September 2025. Now, Tecno is joining this trend by showcasing the Tecno SPARK Slim concept at the upcoming exhibition.

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Tecno SPARKS Slim Concept: Details

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Tecno claims that the SPARKS Slim concept will measure just 5.75mm, which will make it slightly thicker than iPhone 17 Air at 5.5mm. Some official images have been shared by the brand in which the phone can be seen with a sleek profile and compared to a pencil. The device has round corners and a protruding horizontal camera bar similar to the Pixel 9 series.

Tecno has claimed that SPARK Slim will be the industry’s slimmest to pack a 5200mAh or larger battery unit. The battery will be 4.04mm thick and support 45W charging speed. The smartphone flaunts a 6.78-inch 3D curved AMOLED display with a 1.5K resolution, 144Hz refresh rate and 4500 nits brightness.

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Tecno hasn’t confirmed the SoC powering the device, but it will be a high-end octa-core CPU. The smartphone has been made of recycled aluminium and features a stainless steel unibody design.

There is no information about the availability of the SPARK Slim but more details might get revealed when it gets showcase at MWC in a few days.

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Shivangi AgarwalShivangi Agarwal
Shivangi is a tech writer at Smartprix, where she covers consumer technology news with a focus on smartphones, wearables, laptops, and the evolving world of OTT streaming. Since joining the team in August 2021, she has written over 120 in-depth reviews, comparisons, and buying guides aimed at helping readers navigate the ever-changing tech landscape.

With a strong foundation in English literature and education, Shivangi brings clarity, insight, and a reader-first approach to every story. Her expertise lies in breaking down complex features into accessible, practical insights—whether she’s reviewing the latest smartphone or exploring trends in infotainment.

Shivangi holds a B.A. (Hons.) and M.A. in English, along with a B.Ed in English and Social Studies. She is based in Faridabad, India. You can follow her work on Smartprix or connect with her for tech-related queries.

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