A QR code for business chat usually works through a special link connected to a phone number. This guide explains How to Generate WhatsApp QR Code and how the link helps customers open a conversation. The phone number must include the correct country code and should be entered in the required format. Some tools also allow a pre filled message to appear in the chat box. Customers still... https://anantya.ai/blog/how-to-generate-whatsapp-qr-code/