8/F CHINA HONG KONG TWR, 8-12 HENNESSY RD, Wan Chai, Hong Kong

Error 30005: Unknown subscriber.

Error 30005: Unknown subscriber.

The recipient’s SIM might be inactive or disconnected. Verify their number before resending your message.

Related QNAs

Is there a call duration limit per day?

Yes, daily limits apply to prevent spam or misuse. Contact support if you need to extend your threshold.

The international call button is greyed out.

This happens when your balance is zero or the feature isn’t activated. Add funds and refresh the app to unlock calling options.

Can I use custom SMS tones for different contacts?

Yes, under Notification Settings, assign unique tones to specific contacts for easy identification.

I changed SIM cards and lost my SMS.

Your messages are tied to your CallMama account, not your SIM. Log back in using your same credentials to recover them.

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