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

App says ‘Call Failed’ every time I try.

App says ‘Call Failed’ every time I try.

Try the following steps:

Restart your device.
Verify number format and balance.
Clear app cache or reinstall to remove outdated routing files.

Related QNAs

Older messages are missing from my inbox.

Messages older than 30 days are automatically archived to save space. Enable “Message Backup” in settings to retain them permanently.

Why does international calling use so much data?

Each minute of HD voice call uses about 1MB of data. Use Wi-Fi when available to avoid mobile data charges.

Error 30005: Unknown subscriber.

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

Can I share my call balance between devices?

Yes, as long as both devices use the same CallMama account. Balances sync automatically across devices.

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