We've found a few customers ask about why the alphanumeric "from" field doesn't work for them and they are simply provided a "NOT-PROVISIONED" error.
If you're a customer on the free trial, or using PAYG on Credit Card, alphanumeric will not work.
To use the alphanumeric feature you'll need to switch over to be a Telstra Account customer (and receive a Telstra Bill). Of course, if you want to be a Telstra Account customer just contact our TelstraDev team at firstname.lastname@example.org. We'll get you to provide some further information to help set-up your account, and then we can switch you over so you can start using alphanumeric.
The TelstraDev Team