To reset your iPhone password using iforgot.apple.com, visit the website from any device with internet connection. Enter the email address connected with your Apple ID and follow the instructions to begin the password reset process. You can choose to receive a verification code via text message or phone call to a trusted device associated with your Apple ID. If prompted, enter the verification code, then create a new password. After successfully resetting your password, you can use it to access your Apple ID on your iPhone and other Apple devices.