EDIT: Getting it working with Amazon SNS - definitely more of a PITA to setup, but so far working in the sandbox! I can think of no reason Messente doesn’t work, other than maybe it takes them awhile to enable actual use after account creation.
There is an SMS verification area, but I am getting
“Error sending the SMS to +1 978*******. Please refresh the page and try again.”
I did install Messente and applied the API credentials, but I’m only guessing this section uses Messente, as I didn’t install the AWS SMS plugin (yet).