You can add multiple Google accounts on your Android device. However, it considers the first account you sign in with as the default and uses it to sign you in across various Google apps and services.
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How to Add Gmail, Yahoo, and Outlook Email to Android
Setting up Yahoo email on your Android device is a similar process. You can add your Yahoo Mail account through Yahoo's app or Google's. Follow these steps to add a Yahoo Mail account to the Gmail app ...
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