OPPO was released some time ago, the OPPO Reno6 Pro + Detective Conan Edition, that has a electrochromic back which can change from silver to red when current passes through the glass.
In turn, Vivo launched the Vivo S10 with a photochromic back It changes from orange to blue when under sunlight as a result of the sun’s ultraviolet rays.
Xiaomi could be the next to release a phone with a back panel that will change color, according to information from China.
I live S10
Reno6 Pro Detective Conan
The source of the information is the leaky Chinese digital chat station and, according to a post on Weibo, Xiaomi is testing a device with a photochromic / electrochromic back panel with low power consumption.
It remains to be seen which of the two technologies Xiaomi adopts, how we don’t know if Xiaomi plans to release this phone with a photochromic or electrochromic back panel.
It’s also possible that you don’t use glass, but plastic, as the substrate can also be polycarbonate.