Turning off two authentication
How do I turn off two authentication please help
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If it has been less than two weeks, you can turn it off. If it is last the two week time limit, you cannot turn it off anymore.
Two-factor authentication for Apple ID - Apple Support
Can I turn off two-factor authentication after I’ve turned it on?
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.
