The first step is to go to the Yahoo Sign-in Helper, which can be accessed from the Yahoo login page. Enter your Yahoo email address....
https://hackmd.io/@Hubinfo/yahoo-account-recovery-without-verification-code

If you’ve set up two-factor authentication on your Microsoft account, you may have received backup security codes. These codes can be used in place of....
https://community.wd.com/t/how-to-get-microsoft-verification-code-without-phone-number/295899

To recover your Microsoft account, visit the Microsoft Account Recovery Page. Enter your email, phone number, or Skype ID associated with the account. Microsoft will....
https://medium.com/@imsmithjohn7/how-do-i-get-my-microsoft-account-back-1899562bbd3b

Recovering a Microsoft account can be essential for those who rely on it for various services such as Outlook, OneDrive, Xbox Live, Office 365, and....
https://community.wd.com/t/how-do-i-get-my-microsoft-account-back/294280

Traveling: When you travel, you may not have access to your usual phone number or email, making it difficult to receive verification codes. Device or....
https://hubiinfo.weebly.com/blog/how-to-login-to-yahoo-mail-without-verification-code