WhatsApp Cloud Calling API – 17 Most Common Questions & Official Answers (December 2025)

1. Is Calling enabled by default on my WhatsApp Business Cloud API number?
   
   No – Calling is not enabled by default on a business phone number.
   
   
2. What are the minimum requirements to activate WhatsApp Calling?
   
   Your business must have a messaging limit of at least 2,000 business-initiated conversations in a rolling 24-hour period.
   
   
3. How do I enable Calling on my number using to use WhatsApp Cloud Calling?
   
   Configure your WhatsApp Cloud Calling in the Channels in WOZTELL https://platform.woztell.com/channels/channels/
   
   
4. Do inbound calls (customers calling my business) cost anything?
   
   No – All User-Initiated Calls are 100 % free worldwide.
   
   
5. Do outbound calls (my business calling customers) cost anything? What does the price depend on?
   
   Yes – Business-Initiated Calls are charged based on: duration (6-second pulses, rounded up), country code of the called number, and your monthly volume tier.
   https://woztell.com/whatsapp-conversation-based-pricing/
   
   
6. Can I use toll-free numbers (800, 900, etc.) with WhatsApp Calling? 
   
   Yes, as long as the country code of the toll-free number is in the supported list.
   
   
7. How do I configure the business hours when my number accepts calls? 
   
   Yes – you can configure Business-Initiated Calls acepted in WOZTELL
   
   https://platform.woztell.com/channels/channels/
   
   
8. In which countries are Business-Initiated Calls (outbound) blocked?
   
   USA, Canada, Turkey, Egypt, Vietnam, Nigeria.
   
   
9. Can I make outbound calls to numbers in the United States or Canada?
   
   No – Business-Initiated Calls to those countries are blocked.
   
   
10. What is the maximum number of concurrent calls per phone number?
    
    1,000 simultaneous calls. If exceeded, the caller sees “call cannot be placed”.
    
    
11. Can customers call me from WhatsApp Web, Desktop, or tablets?
    
    No – Only calls from the customer’s primary device (usually their mobile phone) are accepted. Companion devices are rejected.
    
    
    
12. Can I set holiday schedules or special unavailability days?
    
    Yes – Use the "holiday_schedule" in WOZTELL https://platform.woztell.com/channels/channels/
    
    
13. How do I send a message with a “Call me on WhatsApp” button?
    
    Send an template message with a WhatsApp call button during an open conversation or customer service window.
    
    
14. Do calls appear in WhatsApp Manager insights and analytics and in WOZTELL?
    
    Yes – Call insights are available in WhatsApp Manager and via the analytics API.
    
    
15. How exactly are billable minutes calculated (6-second pulses)?
    
    Every 6 seconds = 1 pulse. Fractional pulses are always rounded up (e.g., 56 seconds = 10 pulses).
    
    
16. What happens if one call pushes me into a higher volume tier?
    
    The entire call is charged at the lower (higher-tier) rate.
    
    
17. Where can I see the exact per-country and per-tier rates for outbound calls?
    
    Full transparent rates are published at https://woztell.com/whatsapp-conversation-based-pricing/