QR codes have become an integral part of life and it is important to be able to quickly scan a QR code at the right time. Text article on the Androidmir website - https://androidmir.org/anna/76834
In 2020, most branded firmware already has a QR code scanner built into the standard camera app and you only need to find this function in its interface.
But what if there is no such function? Then just download any QR scanner in the Play Store and use it always!