Will the QR code call automatically?
No. A compatible device may open its dialler, where the user controls the call.
Encode a phone number as a tel URI that compatible mobile scanners can offer to open in a dialler.
Enter the number in a recognisable international or local format. Valid spacing, hyphens, and parentheses are preserved rather than silently rewritten.
Scanning does not place a call automatically. Device behaviour varies, and the user must confirm any call through their operating system.
No. A compatible device may open its dialler, where the user controls the call.
An international format can be clearer for audiences in multiple countries, but use the number format appropriate to your use case.