Send the following on WhatsApp
Continue to ChatSMS Verification API: Effortless WhatsApp Number Validation https://www.thestartupfounder.com/sms-verification-api-effortless-whatsapp-number-validation/
SMS Verification API: Effortless WhatsApp Number Validation https://www.thestartupfounder.com/sms-verification-api-effortless-whatsapp-number-validation/