On the main window as shown below, you can enter phone number of contacts and a message to send SMS message.
When composing SMS, it allows you not only to enter the contact’s phone number directly, but also to select the phone number from address book. The processes of registering and managing the address book are same as email address book. If you want to use the address book, click on ⓒ in SMS main window as illustrated in figure 1.
You can add contacts which are frequently used.