To add a contact:

1. Press Dir->Contacts->Enter

2. Press the Add softkey; enter Name, Office/Mobile number, Account and other information of the contact from the keypad. Use the 123 softkey to select between numeric and upper/lower case alphanumeric modes. 

3. Use the navigation keys to select the desired account as Line if you want to assign the contact to a specific account.
4. Press the Save softkey to add the contact or the Back softkey to cancel the change.