How to log in and open Apple through SMS dynamic code?

You need to turn on double authentication, and you can turn on Apple through short-term dynamic code.

Turn on two-factor authentication:

We can turn on "Double Authentication" in iPhone Settings-Name-Password and Security.

After setting up, this iPhone will become your "trusted device". When you log in to AppleID on another device or browser, this trusted device will display a verification code to verify your identity.

If you want to receive the verification code by SMS, please enter and verify the trusted phone number in this setting. You can choose to receive the verification code by SMS or voice phone. After clicking Next, Apple will send a verification code to the phone number you provided. Please enter the verification code to verify your phone number, and then turn on two-factor authentication.

How to use verification code SMS?

For example, if you turn on two-factor authentication and log in to Apple official website, you will be prompted to enter the verification code displayed on the device.

If your device is not with you, or you want to receive the verification code message through a verified phone number, you can click No Verification Code Received, and then click Send me a short message. At this point, you can receive the verification code SMS and follow the prompts to fill in the login.