Releasing a phone number from your Amazon Pinpoint SMS account.
If you don't need a phone number that you had previously requested through Amazon Pinpoint SMS anymore, you can release it from your Amazon Pinpoint SMS account. When you release a number, AWS stops charging you for it in your bill for the next calendar month.
Important
Releasing a phone number from your Amazon Pinpoint SMS account is permanent and can't be undone. If you release a phone number, you won't be able to obtain the same number again in the future.
Deletion protection has to be disabled before you can release a phone number. For more information on deletion protection, see Deletion protection.