I wanted to create an application on https://apps.twitter.com and when I fill the form and submit it, there is an error:
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.
The problem is, that I’ve already added my mobile phone. When I change to “Mobile phones” in Twitter they show my mobile number. So what am I doing wrong?