IN at the beginning of the year, OnePlus showed the Concept One smartphone with disappearing camera, and now unexpectedly introduced yet another concept gadget — OnePlus 8T Concept.
What it is
Like follows from names, this is a concept created on based on the flagship OnePlus 8T. Its main feature — special inserts on rear panel that can change its color from silvery to
This is achieved for account of special film on a metal oxide base that can discolour when exposed to voltage. The applied voltage changes the valence state of the metal ions, in resulting in the color changes.

Such a panel is not will only decorate the smartphone, but and will be able to signal incoming calls and messages.
In addition, the OnePlus 8T Concept has received a millimeter wave (mmWave) module that can transmit and receive electromagnetic waves. Such a module can be used to control gestures (for example, reject a call with a wave of the hand) and monitoring the user’s breathing.
Inspired by natural design and powered by advanced technologies, the OnePlus 8T Concept offers a more natural interaction between user and device via color-shifting ECMF design and mmWave tech.
— OnePlus (@oneplus) December 21, 2020
Like in case with OnePlus Concept One, the company does not plans to sell OnePlus 8T Concept. This is just a demo showing the technologies OnePlus is working on.
A source: OnePlus