A phone QR code uses a tel: link. Scan, confirm, call. It is the right tool when the next step is a conversation, not a website: locksmith vans, clinic after-hours signs, hotel front desks, “call for today’s rate” posters.
Always write the number with a country code. A local 10-digit number that works in one city may fail for a visitor on roaming. Put the human-readable number next to the code as well - not everyone wants to scan.
FAQ: Phone QR Code Generator
Does scanning place the call immediately?
Usually the phone shows a confirmation screen first. That is a platform choice, not something the QR code can skip, and it is better for the person scanning.
Can I use an extension?
You can add pauses in some dialers, but support is inconsistent. Prefer a direct DID number when you can.