Open the Settings app on your iPhone, iPad, or iPod touch
Tap Sign in to your iPhone
Enter your Apple ID and password
Tap Next
Enter the verification code if prompted
Follow the on-screen instructions to finish signing in
On a Mac, open System Settings or System Preferences
Click Sign in with your Apple ID
Enter your Apple ID and password
Click Next
Enter the verification code if prompted
Follow the on-screen instructions to finish signing in
On the web, go to appleid.apple.com
Click Sign In
Enter your Apple ID and password
Enter the verification code if prompted
Complete the sign-in process