I found this for your specific phone model! :)
Adding a contact
1.In the contact list, touch the person icon.
2. From the screen displayed, create a contact in your mobile
phone, SIM card or your account. Add a new account if you do
not have one.
3. Enter the contact's name, and then add detailed information
such as phone numbers and address.
4. Touch DONE to save the contact information.
To save a contact from your call log, touch and hold the desired
phone number to display the options menu, and then touch
Add to contacts.