I have provided some information below that may help.
Accessing Groups
From the Home screen, touch Contacts ➔ Groups.
Creating a New Group
1. From the Home screen, touch Contacts ➔ Groups.
2. Touch Menu ➔ Create.
3. Touch the Name field to enter a Group Name.
4. Touch Ringtone to choose a ringtone for calls from
members of this group. Touch Default Ringtone, or Phone
Ringtone to select a new ringtone.
5. Touch to save the new group.
Adding Contacts to a Group
1. From the Home screen, touch Contacts ➔ Groups.
2. Touch a Group to display it, then touch Add member.
3. Touch contact(s) to mark them for addition, or touch Select
all to mark all contacts. When selected, a check mark
appears in the check box.
4. Touch to add the selected contact(s).
***You can also add individual contacts to a group by doing the following:
-From the Home screen, touch Contacts.
-Long press the contact you wish to place in a group.
-The following options are available (Edit, Delete, Link contact, Add to group etc.)
-Select Add to group.
-Select the preferred group.
Editing a Group
1. From the Home screen, touch Contacts ➔ Groups.
2. Touch a Group to display it.
3. Touch Menu ➔ Edit group.
4. Touch the Group Name field to change the Group Name.
5. Touch Ringtone to choose a ringtone for calls from
members of this group. Touch Default Ringtone, or Phone
Ringtone to select a new ringtone.
6. Touch to save the changes.
