You can try again or maybe you'll realize that you don't have access to the account after all.
It also lets you display your Facebook name and picture in the app, and easily find your friends on Spotify.
Under Two-Factor Authentication, click Edit next to Use two-factor authentication.
Apparently, the number was blocked on her old phone.
Create a Spotify password to log in with your email address instead.
The tool will come in handy when you're traveling or don't have mobile reception.