You can manage your two-factor authentication information from your Account Settings page.
- Click Menu > Account
- Under Two-Factor Authentication, click Change Phone Number
- Enter the new mobile phone number and click Send Verification Code A Six-Digit Code will be sent to your mobile device.
- Type that code under Verify Phone Number and click Submit
Verification codes will now be sent to this phone number.
You can manage your two-factor authentication information from your Account Settings page.