WhatsApp requires a strong, active data connection—either Wi-Fi or mobile data—to function as a VoIP service. Encountering the message "WhatsApp couldn't place call" can be frustrating, especially when you need to communicate urgently.
Fix WhatsApp Call Failed Error: Troubleshooting Steps
Wi-Fi networks might be experiencing bandwidth congestion. Router settings could be blocking SIP protocols used by the app.
Switching Airplane Mode on for ten seconds and then off again forces your phone to refresh its connection to the cellular tower or Wi-Fi network. Mobile data may be disabled or limited.
Fix WhatsApp Call Failed Error: Troubleshoot Connectivity and Settings
When the Problem is External. If the problem persists, verify that mobile data or Wi-Fi is enabled and that other apps can access the internet.
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