I tested the detachable camera concept and was even able to shoot some example images. Xiaomi may have been talking a lot about the cameras on its new 15 Ultra phone at this year's Mobile World Congress,

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

Xiaomi’s not the only company toying with this idea. This week rival Chinese phone maker Realme introduced a concept phone with a 1 inch image sensor that isn’t designed to work with a built-in lens. Instead you can attach any camera lens that uses the Leica M Mount system to the back of the phone.