Yea, I can't join. Even trying to add my phone number results in a "one per account" error message, as people have mentioned.
So I had the same problem. My phone number was associated with a different discord account I was no longer using and I didn't even know the original credentials. Here's how to proceed:
You can attempt to access that account by following these steps below:
- Open an incognito browser window
- Enter your phone number instead of an email address at the login screen
- Click 'Forgot Password'
- Follow the link in the SMS sent to you to reset the password
- Log into your account
- Click on the cog icon to go to User Settings > My Account
-
Add an email address that is not associated with any Discord account and then verify it
- Click on 'Remove Phone Number'
- At this point you can also click on 'Delete Account' if you wish to remove this account
Originally I had a problem with the step in bold: I am an old fart with a single email address, I don't have any spare. Last time I created an email was when gmail was invitation-only. Fortunately my teenage daughter had zillion ready.