Hi...we're using Cognito and sending MFA codes to users via SNS. We started with the default TFN but experienced long delays in deliverability so we applied for a 10DLC. Now that our 10DLC has been approved we want to start using it. My question is: how do I switch from using the default TFN to our new 10DLC? I've looked all around the SNS and Pinpoint consoles but I don't see any options to change the default number. It appears that in Pinpoint console it allows me to delete the default TFN, if I do that will my 10DLC become the default? Please help.
