When you send mail, Gmail automatically creates a contact for each new email address you've entered.
If you'd like to add contact details for any of your contacts (like an address or phone number), follow these steps:- Click the Contacts link in Gmail.
- Check the box next to the contact entry where you'd like to add additional information.
- Click the Edit button.
- Enter the information you'd like in the provided fields. If you have something in mind other than what the fields indicate, you can click More Information to add notes.
- Click Save