Turn off two factor authentication

See the following from Two-factor authentication for Apple ID - Apple Support

If you already use two-factor authentication, you can no longer turn it off. Certain features in the latest versions of iOS and macOS require this extra level of security, which is designed to protect your information. If you recently updated your account, you can unenroll within two weeks of enrollment. Just open your enrollment confirmation email and click the link to return to your previous security settings. Keep in mind, this makes your account less secure and means that you can't use features that require higher security.

I just updated my I phone and the 2 factor authentication is on and I can’t turn it off. I never received an enrolment confirmation email with the update to be able to click on the link someone mentioned in previous comments. I really don’t want this on my phone! Thanks

anuhea176 wrote:

I just updated my I phone and the 2 factor authentication is on and I can’t turn it off. I never received an enrolment confirmation email with the update to be able to click on the link someone mentioned in previous comments. I really don’t want this on my phone! Thanks

This is primarily a user-to-user support forum; other Apple users like you. If my previous reply above doesn't help, there is a Get Support link at the top right of this page that you can use to contact Apple Support.