The recipient’s number might be switched off or blocked for VoIP SMS. Try resending later or verifying that the number supports virtual SMS delivery.
The sender may be using unsupported Unicode or emojis. Ask them to resend using plain text to ensure compatibility.
Poor internet or unstable Wi-Fi often causes this. Switch to mobile data or a stronger signal and try again.
Ensure your card details are correct and there’s enough balance. If your bank blocks international payments, enable it temporarily and retry.
Allow CallMama to access your phone contacts in permission settings. Without this, only numbers are displayed.
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