I will skip my WTFs for trying to sort through this… I run a few education sites that tweet out a daily creative challenge, echo one a different twitter account. I am not quite sure this will work but I logged into the last account I added my phone number to in order to create an app and deleted my phone number.
Then I registered that number with a different account, just so I could hoop jump and create my app.
Now the question to see is if the app really requires a phone number cemented to an account to work or just as a hoop to jump through to set up.