Verifying your Gmail account without your old phone is possible through Google’s alternative recovery options. Begin by going to the Google Account Recovery page (accounts.google.com/signin/recovery) on a browser. Enter your Gmail address and click "Next." When prompted for verification via your old phone, choose "Try another way."If you set up a recovery email, Google can send a verification code to that email address. Check the inbox (and spam/junk folder) of your recovery email, retrieve the code, and enter it to proceed. If you added security questions during account setup, you can answer them to confirm your identity—try to recall details like your account creation date or past passwords for accuracy.You can also use a trusted device where you’re already logged into your Gmail account; Google may allow verification through that device. If these options don’t work, fill out Google’s Account Recovery Form, providing as much information as possible, such as your last known password or account activity details.Once you regain access, update your recovery options by adding a new phone number or email and enabling two-step verification with an authenticator app to avoid future issues.
Read more:  How can I verify my Gmail account without my old phone?