How to Change Your Primary Email Address on Facebook!
Open your Google Account Settings page by going to the top right corner of your screen and clicking on it. Select an Email address from the drop-down menu. Choose Mail, Contacts Calendars from the submenus. Select Add an account under Sign-in options. You may then enter your username and password or simply use Touch ID if you.
Some of you are reporting difficulties with updating your primary email address. To begin, go to your General Account Settings. If the email address you want to use isn’t currently included, click “Add another email” before you can choose it as your primary email address.
Tap on Facebook’s top right. Scroll down and pick Settings. In the Account Settings area, choose Personal Information, then Contact Info. Then tap Remove next to the email address you want to delete.
To change your primary username, go to the main Gmail page and log in to your account. Select Account from the drop-down arrow next to the profile image. If you’d like to delete the alternate email address that you’ll use as a new primary username, click Edit next to “Email Addresses then Remove.
Click on Account and then Account Setting from the Context Menu. Select Email under the Settings page and click Change to change it. On that screen, your primary email address will be displayed.