A Call QR Code is a type of QR code that, when scanned, automatically initiates a phone call to a predefined phone number. This type of QR code contains fixed information, specifically the phone number that the QR code is programmed to call. When scanned with a QR code reader or smartphone camera, the QR code prompts the user's device to open the phone's dialer app with the predetermined phone number pre-populated, ready for the user to confirm and initiate the call. Call QR Codes are commonly used in various contexts, such as advertisements, business cards, or marketing materials, to provide a quick and convenient way for users to contact a specific phone number without the need for manual dialing. While Call QR Codes lack the flexibility of dynamic QR codes, they offer a straightforward solution for initiating phone calls with predefined phone numbers.