Followings are the steps to change emails id in your Facebook account in Facebook app- 1. Open the Facebook app on your phone. 2. Tap on the stacked horizontal lines (hamburger menu) in the lower right hand corner of the screen to open a list of menu options. Facebook home page on the app, with the hamburger menu highlighted on the bottom right corner of the screen. Click on the hamburger menu to head to the profile menu. Stefan Ionescu/Insider 3. Tap on the gear icon on the upper right corner of the screen to go to Settings & privacy. Facebook menu options, with the gear icon on the top right corner of the page highlighted. Enter your account settings by tapping the gear icon on the top right corner of the screen. Stefan Ionescu/Insider 4. On the Settings & privacy screen, tap Personal and account information. Settings & privacy page on Facebook, with the “Personal and account information” option highlighted. Tap on "Personal and account information." Stefan Ione...