How to set up Apple's 2-factor authentication in iOS 10

[iMore.com]

How do you switch from Apple's two-step to two-factor authentication, how do you set it up, and how do you get verification codes? Here's what you need to know!

Full story from the iMore Blog...

 

[anon(9419666)]

I don't know the security of two factor authentication because won't it give more ways to enter a account.

 

[Tartarus]

I don't know the security of two factor authentication because won't it give more ways to enter a account.

No it won't. After submitting your credentials to login, you will receive a passcode by text on your phone.

You need both to login. Thus, twice the security.