So I am trying to create a twitter app on https://apps.twitter.com/app/new and my twitter profile does have a mobile phone linked to it. Even verified it, too!
However, when I press Create your Twitter application… I get
You must add your mobile phone to your Twitter profile before creating an application. Please read https://support.twitter.com/articles/110250-adding-your-mobile-number-to-your-account-via-web for more information.
So… I don’t know.