If you hate the big camera bump of today's smartphones, you'll love the detachable lens of Xiaomi’s Modular Optical System.

During the MWC 2025, Xiaomi introduced its Modular Optical System on a specially designed Xiaomi 15 smartphone.

Xiaomi may have been talking a lot about the cameras on its new 15 Ultra phone at this year's Mobile World Congress, but it had another bit of mobile camera tech up its sleeves. In essence, it's a camera unit that attaches to the back of a phone,