At the moment, Zipchat collects phone numbers exclusively through the WhatsApp channel. The lead generation pop-up does not yet support phone number collection.
To start collecting phone numbers via WhatsApp:
Set up the WhatsApp channel in Zipchat.
Once configured, Zipchat will automatically capture the phone numbers of any customers who message you via WhatsApp.
You can view them under Zipchat > Contacts > Phone Numbers.
If needed, you can export the list as a CSV file directly from that section.