The recipient’s SIM might be inactive or disconnected. Verify their number before resending your message.
This usually happens when your CallMama account is not verified. Go to Profile → Verify Email / Phone, complete verification, and restart the app.
Some services block codes to VoIP numbers. Confirm your number supports SMS or try receiving via a different channel.
CallMama SMS works over the internet (VoIP), not via your cellular provider. A stable connection is needed for sending or receiving.
Inactive balance or expired plan could be the reason. Check your subscription status and renew if necessary.
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