Pls submit a dev support ticket so someone can check your SMS TCR campaign registration.

I did also raise a ticket,

SMS sent. Message id: 15794959004

Message status: Queued

Message status: SendingFailed

{

uri: 'https://platform.devtest.ringcentral.com/restapi/v1.0/account/417908004/extension/417908004/message-store/15794959004',

id: 15794959004,

to: [ { phoneNumber: '+17025221856', location: 'Las Vegas, NV' } ],

from: {

phoneNumber: '+19293998284',

name: 'Mohab Sherif',

location: 'New York City, NY'

},

type: 'SMS',

creationTime: '2024-01-07T17:20:41.000Z',

readStatus: 'Read',

priority: 'Normal',

attachments: [

{

id: 15794959004,

uri: 'https://platform.devtest.ringcentral.com/restapi/v1.0/account/417908004/extension/417908004/message-store/15794959004/content/15794959004',

type: 'Text',

contentType: 'text/plain'

}

],

direction: 'Outbound',

availability: 'Alive',

subject: 'Test SMS using a RingCentral Developer account - Hello this is Transporting With Us! Your driver is on the way!',

messageStatus: 'SendingFailed',

smsSendingAttemptsCount: 1,

conversationId: 662422785303067900,

conversation: {

id: '662422785303067884',

uri: 'https://platform.devtest.ringcentral.com/restapi/v1.0/conversation/662422785303067884'

},

lastModifiedTime: '2024-01-07T17:20:42.839Z'

}

Please read this post and open a dev support ticket.