Transfer Google Auth codes to new phone - using old phone

How to transfer Google Authenticator using another phone

If you have Google Authenticator installed on another phone, you can add your account to your new handset. You don’t need to reset your Authenticator app and both can stay synced.

Transferring your Google Authenticator account details to a new phone is done in the Authenticator app itself, and the process is basically the same for both iPhone and Android users.

Open the Authenticator app on the “older” phone with your account already set up, then tap the three horizontal lines or three dots to open the menu.
Select Transfer accounts, then Export accounts, and tap Next.
Install and open the Google Authenticator app on your new phone. Tap Get started, then Add a code.
Select Import existing accounts, then Scan QR code.
With your new phone, scan the code generated on the older phone to transfer your account.