Hi, I'm John! I will help you with this.
To help narrow down the issue:
- Do you currently have access to your Microsoft account right now?
- Also, when you try to add your new phone number, what exactly happens, do you see any error message or is the option grayed out?
Any additional info about the issue you can provide will be helpful in diagnosing and resolving the issue.
Click "Add comment" to let me know.
Regards,
John J.D.