Step 1. If you’re not already logged in, log on to Twitter.
Step 2. Go to your profile and click on “SETTINGS” or the icon that looks like a wheel or a gear.
Step 3. Select “PROFILE”.
Step 4. Scroll down and select “CONNECT TO FACEBOOK“.
Step 5. Click on “OKAY” and then hit “SAVE CHANGES“.
Please note that the option to connect your Twitter account with your Facebook account may not be available on mobile applications for Twitter. It would be best to complete this through Twitter’s web services by logging on to www.twitter.com on your computer.