To change your default Google account, you’ll first need to sign out of
all of your Google accounts.
Related coverage from Tech Reference:
How to change your Gmail profile picture on an iPhone, and add a personal touch to your email
How to sign out of your Google account on your desktop or mobile device
How to add flight details to your Google Calendar manually or automatically
‘What is Google Authenticator?’: How to set up Google’s two-step verification software to secure all of your Google apps
How to log out of a Gmail account on your iPhone by removing the Google account from your device …
