QR codes can be scanned with any mobile device. There can be a slight difference depending on the OS you are using.
iOS: Open the camera app and point at the QR code, it will show the verification link and open it. The link will open in your default browser e.g. Safari, Chrome, Edge, etc.
There's also a specific shortcut available on the iOS control center to scan QR codes.
Android: For users with Android 8 and newer, the QR code can be captured by using the camera. Similar to iOS, the link will be opened in the default browser.
Please note: For Android versions older than version 8 (Oreo), a third-party app should be downloaded from the Play Store.