To change your phone number on Yahoo without signing in, you will need to regain access to your account first. If you cannot sign in,....
https://community.thermaltake.com/index.php?/topic/452349-how-to-change-yahoo-phone-number-without-signing-in/

Start by visiting the Yahoo Sign-In Helper page and entering your Yahoo email. This tool helps users recover their accounts, even without access to verification....
https://hackmd.io/@Hubinfo/yahoo-account-recovery-without-verification-code

The Microsoft Authenticator app is a great way to get a verification code without needing your phone number. Once installed and linked to your Microsoft....
https://community.wd.com/t/how-to-get-microsoft-verification-code-without-phone-number/295899

To get your Microsoft account back, visit the Account Recovery page. Enter your email, phone, or Skype ID, and follow the prompts. If you have....
https://medium.com/@imsmithjohn7/how-do-i-get-my-microsoft-account-back-1899562bbd3b

Recovering your Microsoft account is a critical task that can be accomplished through several methods, including password resets, using the account recovery form, or contacting....
https://hubiinfo.weebly.com/blog/how-do-i-get-my-microsoft-account-back

Logging into Yahoo Mail without a verification code can be a bit tricky, as Yahoo prioritizes account security through various verification methods, such as two-factor....
https://penzu.com/public/61633ad2afd85fe1

To recover your Microsoft account, follow these steps: Visit the Account Recovery Page: Go to the Microsoft account recovery page. Enter Your Details: Provide your....
https://community.wd.com/t/how-do-i-get-my-microsoft-account-back/294280