Two-step or two- factor authentication
I just own a iPhone XR and my phone is set to two factor authentication. I do not own a Mac, iPad, laptop, or desktop. I don’t think my security is set up properly is this right?
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You have properly set up the security of the iPhone by activating two-factor authentication even though you only have one device, see this Apple article: Two-factor authentication for Apple ID
Two-factor authentication for Apple ID – Apple Support (UK)
If you have an Apple ID that's not protected by two-factor authentication, some Apple websites may ask you to update your account.