Instant disconnection usually means:
Your billing currency is tied to your country of registration. To switch, you’ll need to close the account and create a new one in the target country.
If your network is weak, the app can’t complete delivery.
Enable background running permission. Some phones suspend VoIP when multitasking — allow CallMama to run in background.
Long-press any chat, select multiple threads, then tap delete. This clears space without affecting active messages.
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