Ensure you’ve entered both a message body and recipient number. Blank fields can cause this error.
The destination network might block VoIP connections. Try calling another line or contact the recipient via a different method.
Inactive balance or expired plan could be the reason. Check your subscription status and renew if necessary.
Yes, most online services support CallMama numbers. However, some banks block VoIP-based OTPs for security reasons.
Some countries may be temporarily under maintenance or not yet supported for outbound calls. Check back later or contact support for updates.
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