Follow these steps to change or add the phone number associated with your account.
Enter your email address at https://ID.iowa.gov.
Click the "Next" button.
Enter your password.
Click the "Verify" button
NOTE: If you selected to add an authentication method, you will follow the prompts provided.
Click your name in the upper right hand corner.
Select Settings.
Go to Personal Information.
Click the "Edit" button.
Enter Mobile phone.
Click the "Save" button.
Success!