SNS Text Message: Phone carrier has blocked this message

Question

Use case description: We keep getting failure delivery status for Text Messages, so please increase the limits for the same or let me know is there any other steps I need to take to resolve this.

Right now I am getting this error in cloudwatch

{
    "notification": {
        "messageId": "c4633f78-313d-58cc-a1d1-648dd676304c",
        "timestamp": "2022-11-21 20:52:27.529"
    },
    "delivery": {
        "phoneCarrier": "AT&T Mobility",
        "mnc": 180,
        "numberOfMessageParts": 1,
        "destination": "+19543471228",
        "priceInUSD": 0.00831,
        "smsType": "Transactional",
        "mcc": 311,
        "providerResponse": "Phone carrier has blocked this message",
        "dwellTimeMs": 27,
        "dwellTimeMsUntilDeviceAck": 981
    },
    "status": "FAILURE"
}

and it is happening for most of the phone numbers.

What type of messages do you plan to send?: Transactional

Which AWS Region will you be sending messages from?: US East (N. Virginia)

Which countries do you plan to send messages to?: US

Answer

Hello User,

I think you should delete/mask your sensible Information like the destination in your errormessage, since this is a public forum.

Regarding the problem, I recherched a bit but could not find a real solution, the best thing you could probably do is open an aws-supportcase :)

Also check out this kb-article: https://aws.amazon.com/premiumsupport/knowledge-center/sns-unknown-error-phone-sms/?nc1=h_ls

SNS Text Message: Phone carrier has blocked this message

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