- Check if your customer’s number is valid and opted-in for messaging.
- Ensure your DLT templates and headers are approved for SMS.
- For WhatsApp, verify that your message templates are approved and that the customer hasn’t blocked your number.
- Confirm your wallet balance in SMSGatewayCenter to ensure you have sufficient funds.
If the issue persists, contact our support team at contact @ smsgatewaycenter . com.
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