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