How to receive the iphone dual authentication verification code?

method 1: use the verification code displayed on the trusted device.

if there is a trusted device running iOS9 and later or OSXElCapitan and later, the verification code will be automatically displayed on the trusted device. 1. Log in with an Apple ID and password on a trusted device or browser; 2. Look for login notifications on all trusted devices; 3. Tap "Allow" to receive the verification code; 4. Enter the verification code on another device to complete the login.

method 2: get it by SMS.

if there is no trusted device, you can send the verification code to a trusted mobile phone number by SMS or phone. 1. Click "Didn't you receive the verification code" on the login screen;

2. Select to send the verification code to a trusted phone number; 3. You will receive the verification code by SMS or phone call from Apple; 4. Enter the code on another device to complete the login.