Edit contact details
Editing contact details helps you keep the information in your address book up to date and complete.
Select the contact from your contact list.
Press the menu button in the top-right corner of the window and select Edit.
Edit the contact details.
To add a detail such as a new phone number or email address, just fill in the details on the next empty field of the type (phone number, email, etc.) you want to add.
Press the bottommost button to expand available options, revealing fields like Website and Birthday.
Press Done to finish editing the contact.