What if the displayed QR code itself is problematic, for example, blurry, too small, or from an untrusted source?

If the QR code itself is blurry, pixelated, too small, creased, or otherwise physically compromised, Viber's scanner will struggle or fail to read it. Ensure the QR code is displayed in high resolution, on a flat surface, and at an appropriate size for scanning. For Viber Desktop, try resizing the browser or application window to generate a clearer, larger QR code. Always use official Viber sources for linking QR codes.