Is this a second number that you already have? If so, you can always add it to your T-Mobile ID and you should be able to use it whenever you log into the app with your T-Mobile ID.
If you're looking to get a new phone number, unfortunately the beta is really full and we're not adding in any new lines at this time. If/when we do open it back up, we'll make sure to post to this forum.
This thread was the product of our fantastic collaborators during DIGITS Beta! As many terms have changed and bugs have been exterminated since the Beta launched, the information here may no longer be accurate. If you still have a question, please search our active threads or ask a new question in the DIGITS space!