At MWC, Tecno’s super-thin modular concept phone doesn’t even have a wired charging port

On its own, at 4.9mm thin, Tecno’s modular phone concept barely feels like a smartphone. It has a screen, a basic camera module, four low-profile pogo-pin connectors and that’s about it. From there, you can seemingly build your conceptual phone however you want.

At its booth at MWC 2026, Tecno had two families of modular components in two different colorways, which is surprising at this concept stage. The chunky telephoto lens and housing must weigh over three times as much as the base phone, adding up to 20x zoom capabilities, even if it was a little glitchy during my hands-on. The barrel also offers manual focus, which is always a nice touch. The lens itself is huge, though, making even Vivo’s latest 400mm telephoto lens peripheral look reasonable by comparison.

There are more subtle camera modules, including ultrawide options and a more streamlined periscope telephoto. There’s even an action cam that can attach through Wi-Fi and be used on its own. Depending on the module, transmission is also done through Bluetooth and even mmWave. One module has an antenna that folds out, turning the phone into a walkie-talkie messenger… thing that can communicate without cell service or Wi-Fi. There were also lanyard connectors, grip clips, and several that I may have forgotten. Sadly, the game controller mod wasn’t on the stand, though I’m not sure how you’d use it blindly on the back.

It’s a lot of fun to swap out and even stack the modules, most of which were functionally working. There are plenty of questions left to answer, and I’m concerned about how rigid the magnetic connection would be when pulling this kind of phone out of your pocket repeatedly. Also, who’s going to carry around an attaché case filled with all these things?

Naturally, due to its thickness, the phone has a tiny battery cell (I don’t know the capacity), but you can add 3,000mAh battery packs to the back. And another. And even another, topping out at around 10,000mAh, beating the capacity of most mainstream smartphones. It was only then that I realized it lacked any traditional USB-C charging port. Instead, a charging module can be attached to either of the two pairs of connectors. (And you can add further modules on top of that.)

Tecno often has thrilling concepts and one-off devices at trade shows, so we can’t vouch that this will eventually make its way to consumers. Modular phones are a tricky sell, as they can often lose the efficiencies that come from unified components. Google ended its Project Ara modular concept over 10 years ago, while Motorola’s Moto Mods just weren’t very good and even I struggle to remember LG’s G5 modules.

Adding to that, the company also rarely sells its phones in Western Europe and the US. Judging by the moves being made by other Chinese phone manufacturers in the last year, that could change.