Some carriers don’t return confirmation reports for VoIP numbers. You can still verify delivery in the chat log if the status shows “Delivered.”
Some short-code services do not support virtual numbers. Use a standard 10-digit number or contact the service provider for alternatives.
That message means the recipient’s carrier is temporarily offline. Retry after a few minutes.
VPNs may route traffic through unsupported regions and affect call stability. Disable VPNs during active calls for best results.
You can’t send text messages to landline or fixed-line numbers. Use a mobile number instead.
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