When [Unethical Info] was looking at air purifiers a while back, their eye fell on a Xiaomi 4 Pro, with a purchase ... tag stuck to the filter inside the air purifier that had been keeping track ...

This is the product's overall performance score, based on key tests conducted by our industry experts in the CHOICE labs.

[Flamingo-Tech] was having none of it when they needed a new filter for their Xiaomi air purifier so they set out to fool it into thinking there was a genuine replacement fresh from the box.