Recently, I was checking reviews of different gadgets and smartphones when I found a photo of Redmi Note 3 smartphone where there is a strange (to me) device in white attached on its rear.
Kindly help me knowing what is this unknown device. What is it used for? Is it some kind of OTG storage utility or something else?
The image can be found below,
Image Credits: Gadgets 360 (NDTV)