Select 
.
Select a contact detail, and fill in the field.
When you have added the details, select 
.
You can save your friends' phone numbers, mail addresses, and other information to your contacts list.
Select Contacts.
Select .
Select a contact detail, and fill in the field.
When you have added the details, select .
Select a contact and 
.
Select a contact detail, and modify the information.
When you have edited all the necessary details, select .
Select a contact, > 
, and the desired contact detail.