I'm having issues while sending mms using sandbox phone number.
My app has not been graduated yet for production.
When I'm using sandbox no for sending mms in office api console: it gives error: parameter[object object] is invalid, from number does not belong to you.
when i'm using same in curl format it gives 101 error as parameter value is invalid both in app and postman.
However I am able to send msgs from same number successfully.
Don't know whats the issue.
Having doubt that when app is in production then we can send mms from prod number?
Any help would be much appreciated.