Before you proceed, you need InTouchApp installed on your phone & InTouchApp Extension installed on Chrome or Firefox. Learn more.
Enabling auto-save automatically continues to save all the unknown incoming contacts from WhatsApp to your phone directly.
How to automatically continue saving contacts from WhatsApp to Phone?
Step 1 - Open web.whatsapp.com in the browser and Scan the QR code by using WhatsApp on phone.
Step 2 - Click on Auto button beside the Save Now & you are done!