MWC 2025: 6 of the best conceptual phone designs and future facing tech

Barcelona’s Mobile World Congress has become the phone industry’s major hotspot for launches and new technology. Here are six of the best conceptual designs from this year's event

realme interchangeable lens concept
realme interchangeable lens concept
(Image credit: realme)

Rather than check out the new products at MWC 2025, we’ve rounded ups half a dozen forays into near-future design, taking in solar-powered laptops, yet another attempt to make VR/AR happen, and a couple of camera concepts that point to the future of smartphone photography.

Samsung Flex Gaming concept

Samsung Flex Gaming concept

(Image credit: Samsung)

Xiaomi Modular Optical System

Xiaomi Modular Optical System

Xiaomi Modular Optical System

(Image credit: Xiaomi)

Smartphone photography is approaching a singularity, with highly processed and polished images, aided by AI, being squeezed out of the smallest of sensors across the board. As a result, the images we all take tend to be a little bit samey with that same computational sheen seen right across the board. What comes next could be along the lines of Xiaomi’s conceptual Modular Optical System.

Xiaomi Modular Optical System

Xiaomi Modular Optical System

(Image credit: Xiaomi)

The MOS magnetically clips to the back of company’s flagship Xiaomi 15 smartphone and is essentially a camera module contained within a lens, using the processing power and image handling of the phone but with a much larger sensor and focus abilities. Notably, the Xiaomi system doesn’t cover up the 15’s regular set of (Leica designed) lenses.

Mi.com

Lenovo Yoga Solar PC Concept

Lenovo Yoga Solar PC Concept

Lenovo Yoga Solar PC Concept

(Image credit: Lenovo)

Lenovo regularly reveals a host of laptop concepts at MWC and this year was no different. Alongside folding and extending screens, we especially liked the Lenovo Yoga Solar PC Concept. The idea is simplicity itself: add a slimline solar cell to the rear of the laptop screen and harness free power.

The idea of never running out of battery again is an attractive one. The prototype panel is not only thin but has a conversion rate of 24% (24% of the solar energy hitting the panel becomes electrical energy), higher than a regular home unit. It’s a first look at a tech that’ll hopefully become ubiquitous.

Lenovo.com

Tecno Spark Slim phone

Tecno Spark Slim phone

Tecno Spark Slim phone

(Image credit: Tecno)

Another extreme in phone design was showcased by Chinese manufacturer Tecno’s Spark Slim concept, said to be the world’s thinnest iteration of a standard modern smartphone. Somehow the 5.75mm thin device (excluding the camera ‘bump’) incorporates a regular 5,200-mAh battery, even though it’s a full 2mm thinner than an iPhone 16. Just do your best not to sit on it.

Tecno Spark Slim phone

Tecno Spark Slim phone

(Image credit: Tecno)

Tecno-Mobile.com, @Tecnomobile

Samsung Flex Gaming concept

Samsung Flex Gaming concept

Samsung Flex Gaming concept

(Image credit: Samsung)

In amongst Samsung’s other concepts, which mostly focused on display technology, was this Flex Gaming device. Originally shown in 2022 (when it won a Red Dot design award), the company has now turned the folding, pocketable gaming machine into a working prototype. Clever positioning of the joysticks and buttons allow the entire device to fold flat and the colourful industrial design stands out from the gaming industry’s regulation white or grey.

Samsung Flex Gaming concept

Samsung Flex Gaming concept

(Image credit: Samsung)

News.Samsung.com

Samsung Project Moohan

Samsung Project Moohan Android XR headset

Samsung Project Moohan Android XR headset

(Image credit: Samsung)

Google’s forthcoming Android XR platform is the company’s augmented reality-based operating system, an overlay of information and assistant that uses special glasses – akin to the Apple Vision Pro to re-frame the world around you. Samsung is one of the tech partners, and it used MWC to showcase Project Moohan (‘infinity’ in Korean), its own version of an AR headset. Vision Pro was technically impressive but lacked the killer app to take it from curiosity to must-have. Will Google AR go the same way?

Samsung Project Moohan

Samsung Project Moohan

(Image credit: Samsung)

News.Samsung.com

realme interchangeable lens concept

realme interchangeable lens concept

realme interchangeable lens concept

(Image credit: realme)

realme’s interchangeable lens system is conceptually similar to Xiaomi’s MOS – attach a bigger lens and sensor to a smartphone ‘back – but it offers one major advantage. Thanks to the universal lens mount system, realme proposes that any full-frame mirrorless lens can be added to your phone, instantly opening up the field to high quality glass old and new and offering existing photographers a reason to get on board with the Shenzhen-based electronics company. There was no word of when such a product would make it to market.

realme.com

Jonathan Bell has written for Wallpaper* magazine since 1999, covering everything from architecture and transport design to books, tech and graphic design. He is now the magazine’s Transport and Technology Editor. Jonathan has written and edited 15 books, including Concept Car Design, 21st Century House, and The New Modern House. He is also the host of Wallpaper’s first podcast.